Develop Bugs

A MUST have tool to figure out faster charging of your phone/tablet, w/lots of pics!

With probably over a hundred of gadget and accessory reviews, this is the first time I'm making such a bold statement. Yes, I do consider this as one of the MUST have tools for any smartphone users. This is Charger Doctor, USB amp-volt tester I just got from DX.com : http://dx.com/p/usb-av-usb-power-current-voltage-tester-translucent-blue-silver-235090 and this little guy is only $5.99
How many times we seen posts asking "my phone is not charging fast enough" or "I have a bunch of usb cables and old chargers, which one to use"? I lost a count. When it comes to chargers, at least those get labeled, although some are "mislabeled" or get degraded after months of use. Why do you think our phone is charging slow? Its the current output of your charger AND usb cables you are using. The charging formula is very simple, capacity of your battery in 'mAh' / rating of your charger in 'mA' = to get time in 'h' to charge. The number is usually approximated since nothing is ideal due to efficiency loses. So how do you find this perfect combo of charger and cables to give you the fastest charging speed? Use Charger Doctor!!!
This is a very simple little pass-through usb dongle. For those who know anything about electronics, and I actually took the case apart and snapped a few shots for your to appreciate the guts of it, or anybody who just have an open mind - the principle of this device is simple. You have full size usb input and output with interconnected power and signal, but power will go through a sensing resistor to measure voltage drop for calculating the current (ohm's law of V = I * R). I'm just guessing by looking at this gadget, it has some DAC to convert and to output the reading on a small led display which shows your Voltage reading and I-current reading. Here is a catch, since its full usb - it will connect between your charger and usb cable so you are NOT measuring at the output of the cable going into the phone. By using free Galaxy charging app you can approximately see the drop between the charger and going through the cable. Plus, this way you can "calibrate" the cable loss if you want to use this setup with another tablet or smartphone, other then Galaxy type.
In simple words for those who might not be following my technical explanation, just gather all your chargers and cables, and test different combinations to find the highest current reading you can get. KEEP in mind, when this little gadget is plugged in, it will draw its own current to power up dac and LED display, that is why you will see an additional drop when you compare reading with just a charger and a cable, and with this Charger Doctor in-between So once you find a perfect combo, unplug this dongle because it will "slow" down your charging by funneling some of the current. To demonstrate what I mean, I have a little presentation below with combination of 2 wall chargers and 3 pairs of cables, and took comparison pictures with Charger Doctor and without it. Keep in mind, this might not be 100% accurate, but it will give you a really good idea. As you can see, I found that one of the usb cables (black one) was the worst one, and the best combination of charging speed was using original Samsung OEM wall charger and yellow usb cable from UE boom. I hope they will also release a similar device with micro-usb in and out, but even with full size usb - for $5.99 its one cool gadget! Also, if you have solar powered charger - this will be a must where it will help you greatly to find a sweet sunny spot for a maximum current charge.
Here are the pics.
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And for EE or hobby geeks:

Great timing with your post of this, vectron. I have a knock-off version of the same unit that I got off of ebay. I am actually in the process of making my own micro usb version that I can use in between the charge cable and the phone. I am awaiting for parts to arrive from china, so it will still be a while. Up until I took it apart and removed the usb ports, I was using it in between the charger and cable and it worked great. I agree that it is a "must have", especially for those trying to figure out an ideal charger/cable combination.....

evil510 said:
Great timing with your post of this, vectron. I have a knock-off version of the same unit that I got off of ebay. I am actually in the process of making my own micro usb version that I can use in between the charge cable and the phone. I am awaiting for parts to arrive from china, so it will still be a while. Up until I took it apart and removed the usb ports, I was using it in between the charger and cable and it worked great. I agree that it is a "must have", especially for those trying to figure out an ideal charger/cable combination.....
Click to expand...
Click to collapse
Post details of your DIY!!! micro-usb update will be highly desirable!!! One connector is surface mount, the other one is through-hole on this device. Definitely feasible to remove and white-wire with micro-usb

I just recently got one of these as well. I highly recommend it. The only one of its kind at a reasonable price.

Would I be correct in assuming that the app that you are using basically gives the same information as this device?

JCreazy said:
Would I be correct in assuming that the app that you are using basically gives the same information as this device?
Click to expand...
Click to collapse
Relatively speaking yes. But Galaxy Charging current app only works with Samsung Galaxy phones, and for example you will have to buy premium version to use it with older models like S3. And if you want to figure out your charging current on Nexus or any other tablet or iDevice - this voltage/current meter will still work without a need for an app. Also, very important, keep in mind that app gives you total current through the charger and the wire. Those are 2 variable and you will not know which one is bad until you break it up. Thus using both voltage/current meter and app gives you the most info when you troubleshooting your connection.

This is super cool! Great write up! Gotta get one or 12.
The fact that they can design, develop, test, manufacture, distribute and ship this product from China to the U.S. and cover PP/CC fees all for $5.99 is absolutely mind boggling.
I could barely ship a pencil down the street for $5.99...

Probably not too hard when you pay the factory workers $1 a month. ...
Sent From My Ginormous Note 2

planetbeen said:
Probably not too hard when you pay the factory workers $1 a month. ...
Sent From My Ginormous Note 2
Click to expand...
Click to collapse
And probably considering that components in there all together cost under $3. All those products are manufactured in big quantities and they probably make very little profit on each unit.

Rootabaga said:
This is super cool! Great write up! Gotta get one or 12.
The fact that they can design, develop, test, manufacture, distribute and ship this product from China to the U.S. and cover PP/CC fees all for $5.99 is absolutely mind boggling.
I could barely ship a pencil down the street for $5.99...
Click to expand...
Click to collapse
Much less to do it for $3.27... lol
http://www.ebay.com/itm/New-Portabl...uter_Power_Supply_Testers&hash=item485a80ba76

JCreazy said:
Would I be correct in assuming that the app that you are using basically gives the same information as this device?
Click to expand...
Click to collapse
Not for me.
Based on Vectron's review, I ordered and received one from Amazon. I love it.
The information is interesting: on my Note 2, I use the app Galaxy Charging current lite
and it always reported '1680 mA' (yes, I kept hitting 'refresh'), while the usb current gadget displayed 1.1 A (and yes, I connected to a 2A wall charger).
So the app is not accurate.

I ask the creator of Galaxy Charging Current about using it on Note 2, and here's the reply:
As far as I know the device does not provide that info, and the app has no way to guess it, unfortunately.

SiliconBug said:
I ask the creator of Galaxy Charging Current about using it on Note 2, and here's the reply:
As far as I know the device does not provide that info, and the app has no way to guess it, unfortunately.
Click to expand...
Click to collapse
Huh? I'm pretty sure I got some readings when running it on my Note 2... I already uninstalled it as it wasn't accurate.

really nice...

looks to me like the galaxy charging current app average (in mAh) is pretty accurate when compared to the charger doctor...good to know, albeit it rounds up.

vectron said:
The charging formula is very simple, capacity of your battery in 'mAh' / rating of your charger in 'mA' = to get time in 'h' to charge.
Click to expand...
Click to collapse
uh... no. While your algebra is correct, mAh/mA = h is only true if all other things are equal. All other things, in this case, being voltage. And they are not equal. The voltage of your battery is somewhere between 3.6 and 4.2 volts. The voltage of your *USB* charger is always 5 volts.
So to get the total amount of time it would take to charge your phone... you need POWAH!!!! (power)
Power (watts) = volts * amps
Total amount of power in my Galaxy S3's battery:
3.8v * 2100mAh = 7980mWh = 7.98Wh​
Total amount of power being delivered by my Samsung USB charger:
5v * 1A = 5W​
Total amount of time required to fully charge a completely dead Galaxy S3 battery, using a Samsung charger:
7.98Wh / 5W = 1.596h = 1 hour, 35 minutes, 45 seconds.
*gets very annoyed when people do not understand electricity*
**also, don't go around telling people "it's not the volts that kills you, it's the amps!" - it's neither. it's the watts.**

moeburn said:
uh... no. While your algebra is correct, mAh/mA = h is only true if all other things are equal. All other things, in this case, being voltage. And they are not equal. The voltage of your battery is somewhere between 3.6 and 4.2 volts. The voltage of your *USB* charger is always 5 volts.
So to get the total amount of time it would take to charge your phone... you need POWAH!!!! (power)
Click to expand...
Click to collapse
I agree, but you are missing a point. While a handful of people will understand these details, and not to insult everybody else - majority needs a simple basic "concept" formula to round off calculation, not to mention for some english is not even a first language. Otherwise, you need to continue with more formula correction factors to take into account heat dissipation and efficiency of conversion, and so on. Oh, also keep in mind that majority of people charge their phone when it's on and probably syncing all their social media updates in the background among other things that drain your battery while charging. How about factor in people using PC usb cables instead of a quality 24AWG gauge wire cables? Or all of those cheap ebay ac adapters? And so on...
Just makes it easy to simplify the equation instead of preaching EE101. No reason to get annoyed, especially around Holiday season Just trying to help people with hundreds of my reviews here on XDA

vectron said:
I agree, but you are missing a point. While a handful of people will understand these details, and not to insult everybody else - majority needs a simple basic "concept" formula to round off calculation, not to mention for some english is not even a first language. Otherwise, you need to continue with more formula correction factors to take into account heat dissipation and efficiency of conversion, and so on. Oh, also keep in mind that majority of people charge their phone when it's on and probably syncing all their social media updates in the background among other things that drain your battery while charging. How about factor in people using PC usb cables instead of a quality 24AWG gauge wire cables? Or all of those cheap ebay ac adapters? And so on...
Just makes it easy to simplify the equation instead of preaching EE101. No reason to get annoyed, especially around Holiday season Just trying to help people with hundreds of my reviews here on XDA
Click to expand...
Click to collapse
I get that you would want to simplify it to provide a rough estimate, and it makes sense to leave out things like heat dissipation and efficiency of conversion because of how small and insignificant of a difference that they make. But h = mAh / mA isn't simplified, it's wrong. I could say something like "h = mA * 2", and it would be very simple, but it would be completely wrong. Not a rough estimate. Just a number that means absolutely nothing.
And my correct formula isn't that much more complicated. If you can understand h = mAh / mA, you can understand h = (mAh * v) / (mA * v).
And the quality of a USB cable will make absolutely no difference in the speed of charging. Either it can handle 5-10 watts, and it charges just fine, or it can't handle 5-10 watts, has too much internal resistance, heats up, and melts/catches fire. The quality of a USB cable can affect things like EMI, signal interference, latency and timing, and can be important when you are trying to extend a cable over large distances, but it will have absolutely no effect on the amount of current transmitted by your charger, and thus the amount of time it takes to charge.

Hmm, if you don't think the impedance of 24awg wire versus 32awg wire used in typical pc usb cable makes no difference in voltage drop due to resistance at 2A current sink during Note 2 charging, then sorry mate. EMI, signal interference, that's were you need electronic choke in a form of popular ferrite beads used in quality cables like from monoprice.
I didn't say anything about your formula being incorrect. I'm just saying for rounding thing off having a simplified formula makes more sense for a ballpark calculation. If you think about it, your calculation is theoretical, but in reality it will take almost 2hr to charge your battery due to other imperfection factors and variation. So as I said, for a practical purpose simplified formula (even so it's not correct) makes more sense.
So buddy, let's agree to disagree

I've seen this

usb cables

hi. I'm noticing big differences in the charge rate depending on the cable i'm using. some cables can't charge the phone even if they have absolutely no issues with other phones, so i was thinking about creating some sort of cables db to help each other if we need to buy spare cables. i'm still looking for a good app to post more accurate tests, but for the moment here's what i've found.
cables (tested with the stock n5 charger)
n5 stock
no problem, charging at more than 1000 mA​
amazon basics (1,8m)
not charging, discharge rate reduced of about 200 mA​
sgs2 stock
very slow charging, about 200 mA​
Premium USB to Micro USB Charge & Sync Cable 6ft- Black (link)
Charges at +1000ma with any of my 2a power supplies.​
all in one chargers:
sgs2 stock
very slow charging, about 300 mA​
i've tested other cables, but i can't remember where i got them, anyway none of them was charging the phone
i've tested the same cables with different chargers (all of them rated 1000mA) without major differences.
the tests were made using battery monitor widget.
if you have cables to test post the results here, i will update the op as soon as i can. please also test already tested cables to confirm what we've found.
i'm also looking for suggestion for better apps or better test methods.

Premium USB to Micro USB Charge & Sync Cable 6ft- Black
http://www.monoprice.com/Product?c_id=103&cp_id=10303&cs_id=1030307&p_id=9762&seq=1&format=2
Charges at +1000ma with any of my 2a power supplies.

I used my Sprint Samsung GSII (E4GT) charging brick and cable last night and under battery stats it showed charging (AC) and it seemed to be charging the phone quickly.
Is there a place to see this on the stock rom or do I have to download an app to see the voltage?

Raistlin1 said:
I used my Sprint Samsung GSII (E4GT) charging brick and cable last night and under battery stats it showed charging (AC) and it seemed to be charging the phone quickly.
Is there a place to see this on the stock rom or do I have to download an app to see the voltage?
Click to expand...
Click to collapse
i used the app because i don't know a better way.

KoRRo89 said:
i used the app because i don't know a better way.
Click to expand...
Click to collapse
what app did you used?
i wanna do this tests too

escape21 said:
what app did you used?
i wanna do this tests too
Click to expand...
Click to collapse
i used battery monitor widget. play store link. the better option is to let it run and post an average of the graph or you can just post the instant value but it's not so accurate...

Ok, I've made a more accurate test and I've taken some screenshots, for the moment I'm going to upload them here, tomorrow I'll update the op.
OK, this is a charge using stock charger and cable, from around 50% to 100%.
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A bit slower than previous time, but nothing major. At the moment I was sleeping, so as usual for me it was in flight mode and with sleep as Android app running.
This is a partial charge (14% to 55%) with the stock charger and the Amazon basics cable.
much faster than previous test, but still not enough. Tested with very light use, and in flight mode for most of the time.
Inviato dal mio Nexus 5 utilizzando Tapatalk

I have several PortaPow 24AWG fast charge cables, best money I ever spent. My phone actually charges in the car now (and fast) while I'm using gps and streaming music over bluetooth, the cheap ebay cables I had before couldn't charge my devices while in use. When I use the Portapow cables they show up as AC charging in the battery settings instead of usb like the old ones.

green_comet said:
I have several PortaPow 24AWG fast charge cables, best money I ever spent. My phone actually charges in the car now (and fast) while I'm using gps and streaming music over bluetooth, the cheap ebay cables I had before couldn't charge my devices while in use. When I use the Portapow cables they show up as AC charging in the battery settings instead of usb like the old ones.
Click to expand...
Click to collapse
just to clarify, all the cables i've tested are showing up as AC even if the charge is so slow.

Ahh ok, I found my cheap/slow cables would show usb under battery settings. I'm finding the Portapow cables very good though, I've tested them on my cars usb input, a Ventev r2200 4.2A charger, and a Kensington Powerbolt 4.2 and have performed flawlessly so far. I'll have to do a few more test and post the results up here. :good:

I have read reports of some users complaining that their micro usb cables don't fit in certain nexus 5 cases. Does anyone know of any cables (preferably that charge well lol) that are slim around the connector?

unvaluablespace said:
I have read reports of some users complaining that their micro usb cables don't fit in certain nexus 5 cases. Does anyone know of any cables (preferably that charge well lol) that are slim around the connector?
Click to expand...
Click to collapse
the cable suggested by @gtj0 seems to be slim enough, but better wait for him.

KoRRo89 said:
hi. I'm noticing big differences in the charge rate depending on the cable i'm using. some cables can't charge the phone even if they have absolutely no issues with other phones, so i was thinking about creating some sort of cables db to help each other if we need to buy spare cables.
Click to expand...
Click to collapse
I've noticed the same. Some chargers/cables seem to charge quickly, other slowly, if at all, even though the phone indicates AC charge status. This is a great idea for a thread and DB. Do you think it's more the cable vs the charger?

SykesAT said:
I've noticed the same. Some chargers/cables seem to charge quickly, other slowly, if at all, even though the phone indicates AC charge status. This is a great idea for a thread and DB. Do you think it's more the cable vs the charger?
Click to expand...
Click to collapse
Yes, from what I've noticed it's more the cable. I only tested the original charger, another LG charger (1000 ma, from my old p990), a choiix (cooler master) 1000 ma charger, and my choiix external power bank. All the 3 1000 ma chargers are charging at almost the she speed, independently from the cable, che stock 1200 ma charger is definitely faster with the stock cable, no major differences with other cables, so I think the problem is definitely the cable.
Inviato dal mio Nexus 5 utilizzando Tapatalk

OK, so I've gone round all of my chargers and cables. There seems to be no rhyme or reason as to which option works best. Some cables hardly charge with some chargers, whereas charge much better with other chargers and vice versa. That being said the only comb that I've found that comes close to 1000mA is the LG charger and LG cable which came with the phone. All other combos max out at around 600mA and some combos hardly break 200mA.
Unfortunately I can't say what cables I've tried nor the chargers used. I just don't remember where they I bought them all or what device they came with.

Ok, this is the graph of tonight recharge using my power bank (1a out) and the stock cable WHILE PLAYNG INGRESS!
I can definitely say that (at least for me) the charger is absolutely not a problem
Inviato dal mio Nexus 5 utilizzando Tapatalk

so whats the difference here anyone want to guess? is this a matter of length of cable vs 22 awg vs 27awg type of thing?
did a fast test, my worst cables were the shortest ones oddly.

Ashcunak said:
so whats the difference here anyone want to guess? is this a matter of length of cable vs 22 awg vs 27awg type of thing?
did a fast test, my worst cables were the shortest ones oddly.
Click to expand...
Click to collapse
I don't think it's a matter of length. For my cables it's true, the longest are the worst, but the sgs2 cable is just 2 or 3 cm longer than the n5 one and is far worst, just a bit better than the Amazon basics cable that is almost twice the length. Also one of the first replies was about a 1.8m cable that doesn't have any problem.
Regarding the awg I'm not totally sure because I don't know much about it. From what I know it's a measure system for the wires and it works the opposite than the metric system, so with the smallest numbers the cable gets bigger. The only cable with an awg number on it it's the Amazon one and it's a 28 awg. Seems strange that the n5 cable could be a 22 as hinted in your post since the Amazon cable seems to have almost a double external diameter compared to the stock one...
Also, according to a table I've found, a 28awg cable should be able to carry from 0.8 to 1.4 amps, far more than what I get using it.
Inviato dal mio Nexus 5 utilizzando Tapatalk

RAVPower 20100mAh Quick Charge 3.0 Power Bank – Unboxing & Review

Introduction​
RAVPower has launched an impressive concentrate of portable power that features Quick Charge 3.0, the latest technology available from Qualcomm to charge QC 3.0 compatible devices much faster than using conventional charging technology, and even an USB Type-C port, that is becoming a standard nowadays with latest devices.
This is the RAVPower Turbo+ QC 3.0 20100mAh Battery Pack.
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This is the updated version of the Power Bank from RAVPower with QC 3.0 (Turbo+) support instead of the previous QC 2.0 (Turbo, without the "+" character). Luckily I had the possibility to compare both versions, so I’ll show you both.
Unboxing
Packaging (eco-friendly) comes with two Slim Micro-USB cables (~26cm & ~66cm), a Protective Pouch, a small Multilanguage Quick Start Guide, a Warranty Card and the Power Bank (of course).
Both versions come with the same accessories, only packaging is different.
I must admit that this Power Bank impressed me because it seems bulky, but in reality it is pretty lightweight and small enough to be handled easily in your bag without sacrifying too much space. I like its clean design, with rounded borders and opaque painting.
Don’t forget that this is a 20100mAh Battery Pack, so if you are going to buy it so must consider that it isn’t as portable as less powerful ones. (Batteries technology is improving day-by-day though so in the future we might be able to get smaller – but not less powerful – batteries)
It weighs 376g, its chassis is made of Plastic (feels strong though) and on the front side there are 4 Blue LEDs used to check battery remaining charge with a power button. The power button is only used to check battery remaining charge so you don’t have to press it to turn on the power bank. It turns on automatically when you connect a device whatever port you are using.
It comes with multiple USB ports:
- 1x Micro-USB port that support also Quick Charge
- 1x USB Type-C port that can be used in both ways (Input and Output)
- 2x Full-Size USB Ports (1x with Quick Charge support)​
As regards its performance, I am able to charge my Galaxy S4 (GT-I9500, Exynos Variant) at the same speed as with the Original Samsung Charger (with 2.0A output) without any voltage stability issue. (I have tested both USB Ports). I have also tried to charge a Galaxy S4 (GT-I9505, Qualcomm Variant) that comes with Quick Charge 1.0 technology support and it managed to charge the device in more or less 45 minutes. Also, I have tried the USB Type-C port with a Nexus 6P (luckily i have a friend at University that has it), and it does seem to work as good as with the Original Nexus Charger.
Battery Life​
Battery Life is simply amazing, it is hard to discharge the power bank completely in less than 1 week, especially if you need to charge only one smartphone that doesn’t come with a large battery. There is always some juice left even if there is only one LED lighted up (so it means less than 25% of available battery). When the battery level is extremely low, the LED starts to blink but I managed to charge a Sony PSVita (2210 mAh) nearly completely after the LED started to blink so this is pretty good.
This is a GIF that i made, unfortunately XDA doesn't support GIF playback so i had to convert and upload it on YouTube.
Efficiency​
I made some tests using an USB Tester with the included USB Cable (short variant), as you can see it is able to provide 1.9A without major issues (maybe a bit low voltage, but using another cable it is higher). I don’t have a 3A resistor so I won’t be able to show you a test under higher load, but I have stressed both USB ports at the same time and I can confirm you that it is able to handle more than 3A load without any issue at all.
Charging
I’m using a RAVPower Turbo+ QC 3.0 Charger to charge the battery. (Best Combo)
I left the battery connected to the charger at 23:30, and when I got up (08:15) the battery was fully charged and cold, so I can say that it took more or less 8 hours (probably 7 hours, because both battery & charger were cold) to charge completely. Remember that even if Qualcomm Quick Charge makes the whole charging process faster, it is also temperature controlled so if battery gets hot current output gets reduced to cool down the battery without causing damage.
Power Output seems to be extremely efficient here, voltage is much higher at 2A than using the Battery.
It is a bit heavy, but extremely powerful and feels pretty well made.
This is the best charger i have ever tried. I can recommend it even if you have to charge other kind of devices.
Conclusions​
This battery is one of the most complete available on the market, so if you need a full-optional and powerful Power Bank, then this is the right choice. I know, it isn’t easy to carry everywhere because it doesn’t fit in your pocket, so this is something useful if you carry a bag with you or if you have anything else where to fit the battery, but actually no other power banks offer so many USB ports, Quick Charge 3.0 support and Quality Battery Cells inside.
If you don’t need Quick Charge 3.0 support, I recommend you to get the QC 2.0 version to save some money. Also, i recommend you to get also the RAVPower Turbo+ QC 3.0 Charger (or Turbo QC 2.0) for best results.
I’ll add an additional review about reliability in 6 months more or less to let you know if I find any kind of issue during full-term usage.
Rating: 8.8
Packaging and Accessories: 8
Design and Materials: 9.5
Performance and Efficiency: 8
Battery Life: 10
Price: 8.5 (based on Amazon.it price)
You can find full-res images (I know, Quality isn't excellent) here: http://imgur.com/a/vZwQN​

Reserved

Alberto96 said:
I left the battery connected to the charger at 23:30, and when I got up (08:15) the battery was fully charged and cold, so I can say that it took more or less 8 hours (probably 7 hours, because both battery & charger were cold) to charge completely. Remember that even if Qualcomm Quick Charge makes the whole charging process faster, it is also temperature controlled so if battery gets hot current output gets reduced to cool down the battery without causing damage.
Click to expand...
Click to collapse
20100 mah = 20100x3.7= 74Watt hours
If it was fully charged in 7 hours, thats around 12W going into the power bank. This is slow.
I would have expected it to charge full within 5 hours which would be at least 15W or more going in.
The charger i have and what i find curious about it is if you look at the specs they are actually QC2.But it says QC3.0/2.0 on the charging port. Not on qualcom's list of certified QC3 chargers.
if you look at the battery specs they are QC3 and is on qualcom's list as certified QC3.
Would be good if you can get a double digit meter so we can see how much power that charger is actually putting into the pack.
Also have you been able to test with a QC3 phone and measure how long it took.

One Twelve said:
20100 mah = 20100x3.7= 74Watt hours
If it was fully charged in 7 hours, thats around 12W going into the power bank. This is slow.
I would have expected it to charge full within 5 hours which would be at least 15W or more going in.
The charger i have and what i find curious about it is if you look at the specs they are actually QC2.But it says QC3.0/2.0 on the charging port. Not on qualcom's list of certified QC3 chargers.
if you look at the battery specs they are QC3 and is on qualcom's list as certified QC3.
Would be good if you can get a double digit meter so we can see how much power that charger is actually putting into the pack.
Also have you been able to test with a QC3 phone and measure how long it took.
Click to expand...
Click to collapse
It is something that i'll do as soon as possible.
Also, remember that you can't completely base your opinion on technical specs, because there are many other factors such as Temperature that might increase charging times.

Alberto96 said:
It is something that i'll do as soon as possible.
Also, remember that you can't completely base your opinion on technical specs, because there are many other factors such as Temperature that might decrease charging times.
Click to expand...
Click to collapse
Cool, quote or @ me when you do.
If you see here the times, with qc2 charger its 5.5 hrs.
With QC3 it should be better. Why your ravpower charger cannot do it ?
Would also request you to upgrade your usb meter and re-test with this power bank and charger.
https://www.youtube.com/watch?v=-BkM8Hf5lmA
I do not speak Italian but i understood he is saying that meter works with xiaomi mi5 and qc3
PS: best of luck to your Azzuri tonight

Real Battery Capacity after 3 Months of Usage. Consider that the battery wasn't completely dead, with flashing low-battery leds, this might be a bit lower.
I haven't measured battery charging times this time because i had to use the Standard 5V charger in order to get the correct mAh value, next recharge will be made using the QC Charger.

Thanks for your post

Alberto96 said:
Real Battery Capacity after 3 Months of Usage. Consider that the battery wasn't completely dead, with flashing low-battery leds, this might be a bit lower.
I haven't measured battery charging times this time because i had to use the Standard 5V charger in order to get the correct mAh value, next recharge will be made using the QC Charger.
Click to expand...
Click to collapse
Looks pretty close to stated capacity.
Can your power meter show two digits? Charge times is not so clear.

Cool review. It is useful . Have you found it is similar to Anker core 20100?

iLsyyyyyyy said:
Cool review. It is useful . Have you found it is similar to Anker core 20100?
Click to expand...
Click to collapse
I did not have the chance to review the Anker one too.

Alberto96 said:
I did not have the chance to review the Anker one too.
Click to expand...
Click to collapse
maybe you can look at this one, I bought it recently, it is 13400mah. Really like the durable design

[Review] Choetech QC 3.0 10400 mAh battery pack

Disclaimer: I was sent these items at a heavy discount in exchange for my fair & honest review
Choetech 10400 QC 3.0 Enabled Battery Pack:
Overview
Choetech took their old QC 2.0 battery and made some improvements to it while also adding QC 3.0.
Ports/Charging:
There are a variety of ports offered on this battery which serve different functions. First the battery can be charged on of two ways: you can either use a microUSB cable (like the one included in the box), or a lightning cable if you happen to also have an Apple device. Both cables will allow the battery to be charged at 5V/2.4A; however, I found the battery charges via QC 2.0. I tested it via my multimeter which show the battery drawing ~9V/1.8A which is closer to 16.2 W of power. I’m not sure why the battery doesn’t list this as an input because it certainly takes all of the power.
On the output side you are given the option of using 2 USB-A standard ports. One of these ports will charge at 5V/1A which is also known as QC 1.0, while the second one charges via QC 3.0. The voltage range is variable as is the current. The ranges for the QC 3.0 port are: 5V/3A (15W), 9V/2A (18W), 12V 1.5A (15W). All of these outputs are consistent with the QC 3.0 standard which allows the voltage to step in smaller increments thus reducing the overall heat and increasing charging efficiency.
Design/Build Quality:
This battery has a very nice, solid aluminum housing that really makes it feel nice. The top/bottom edges are chamfered, while the sides are black anodized aluminum. This is the perfect pairing for the HTC 10 given its nice chamfered edge, and similar aluminum construction. I have another Choetech battery pack that is equally well made and feels like a tank. I don’t foresee this battery buckling under normal use, or even some drops given how well made it feels.
To use the battery, you first need to hit the power button that in turn lights up a series of 4 bright LED’s. These LED’s will indicate the current charge left on the battery while also looking great. When you are charging the battery pack the LED indicating its current level of charge will blink as an indication of how much power is currently store in the battery.
What’s in the Box:/B]
-Choetech 10400mAh power bank
-microUSB cable
-Documentation
Charging Multimeter test:
Charging Ports:
Here is breakdown of the voltages/rates the battery can be charged at:
Output: 5V/1A (5W)
QC 3.0 Port: 5V/3A (15W), 9V/2A (18W), 12V/1.25A (15W) [/SIZE]
Battery I/O Rating Pictures
Given the battery’s two output ports, you will be able to charge two devices simultaneously, although I would only use it to charge one at a time personally.
Overall This is a great small QC 3.0 enabled battery pack that will keep everything working on the go. I own battery packs from EasyACC, Choetech, Aukey, and Anker, but this one is still one of my favorites for what it offers. I plan on using this battery to charge my HTC 10 while at school, and on the go in general.

Nice review, I've done a similar thing on amazon, also found the charger to be great. I did a quick charging test and it was averaging around 1500mA, whereas the htc one main plugs charger was 1600mA, so to charge that close to a main plugs socket is great. Specially for a portable charger where you want it charging fast!

Phil750123 said:
Nice review, I've done a similar thing on amazon, also found the charger to be great. I did a quick charging test and it was averaging around 1500mA, whereas the htc one main plugs charger was 1600mA, so to charge that close to a main plugs socket is great. Specially for a portable charger where you want it charging fast!
Click to expand...
Click to collapse
This battery will output the rated (18W) if the phone can handle that much current. I posted a picture in my review using a multimeter to measure the power (16.8W at the moment I took the picture). I don't know what the phones peak input current is, but I know it's higher than than S7 Edges 15.03W input, and Neuxs 6P's 15W. I've seen similar ranges of 15-17W using the stock HTC charger which means this battery is outputting the proper current for the phone to charge as fast as it possible can via the QC 3.0 port.

How many full charges can it deliver to the phone?

Lurien said:
How many full charges can it deliver to the phone?
Click to expand...
Click to collapse
Just over 2 from my experience, but that's 0 to 100 so not bad.
It is damn fast though for a portable charger. For example I've gone from 33% to 100% in a little over an hour

Phil750123 said:
Just over 2 from my experience, but that's 0 to 100 so not bad.
It is damn fast though for a portable charger. For example I've gone from 33% to 100% in a little over an hour
Click to expand...
Click to collapse
Not bad at all.. that's like having 2 spare batteries and change... I'm considering getting this. Thanks for the feedback.

Lurien said:
How many full charges can it deliver to the phone?
Click to expand...
Click to collapse
Phil750123 said:
Just over 2 from my experience, but that's 0 to 100 so not bad.
It is damn fast though for a portable charger. For example I've gone from 33% to 100% in a little over an hour
Click to expand...
Click to collapse
Lurien said:
Not bad at all.. that's like having 2 spare batteries and change... I'm considering getting this. Thanks for the feedback.
Click to expand...
Click to collapse
If you account for the efficiency external batteries have (not very high due to heat losses) the 2 full charges is about right in my experience.

Pilz said:
If you account for the efficiency external batteries have (not very high due to heat losses) the 2 full charges is about right in my experience.
Click to expand...
Click to collapse
Yup when looking at mah of portable batteries I always take off about 30%. Assuming it's good quality that about what you get. I. E in this case 10400mah you get about 7000mah actually usable. Obviously that goes down with time too.

Phil750123 said:
Yup when looking at mah of portable batteries I always take off about 30%. Assuming it's good quality that about what you get. I. E in this case 10400mah you get about 7000mah actually usable. Obviously that goes down with time too.
Click to expand...
Click to collapse
Plus when quick charging you could lose some of the ~7000 you might expect, regardless of that I still find it to work as well as my other 1000mAh battery packs.

Things I miss in your review:
How much does it cost, and how are competitive products placed?
How long does it take to charge the Battery with a QC2.0 Charger?
How much is really inside?
You'd have to use a constant 1.5A load and check How long it lasts... ?
Except from that. Nice review Thanks.

Choetech has stated they're using Samsung Li-Ion cells so they're likely these. I'll crack open mine when I receive it, haven't ordered it yet.
http://gamma.spb.ru/media/pdf/liion-lipolymer-lifepo4-akkumulyatory/ICR18650-26H.pdf
http://lygte-info.dk/review/batteries2012/Samsung ICR18650-26H 2600mAh (Pink) UK.html
-26H is the successor to -26F
http://data.oomipood.ee/kasutusjuhend//ICR18650-26FM.pdf
http://dampfakkus.de/akkutest.php?id=120
http://lygte-info.dk/review/batteries2012/Samsung ICR18650-26F 2600mAh (Pink) UK.html
I personally have these -26H's inside my 4x18650 5V2A power bank case.
They're great cells for indoor use and low current draw (per cell) use.
They'll happily dump over 90% of the specified Whours even at a full 5A discharge. (which is 2600*3.63/1000=9.44Wh)
At a more sane discharge current of 1A/2A they'll be able to provide ~ 99/96% of the specified Whours.
So how much is really inside? Spec sheet says 10200mAh's assuming 0.2C discharge and 2.75V cut-off.
In practice? ~10200-10600mAh's depending on the discharge current. (this is of course fresh cells, capacity will drop over time)
This of course does not take into account the power loss which occurs when you boost the voltage up.
Assuming a nice, above average 90% efficiency inside the power bank you'd be looking at ~9200mAh's.
Then taking into account the voltage stepdown happening inside the phone, let's assume 90% efficiency again and we'd be looking at ~8150mAh's.
Aaand then taking into account the cable loss (- connector losses), let's assume you have an average 26AWG 1 meter cable and you transfer 18W of power at 9V2A, loss is 6%.
We're down to ~7550mAh's.
Saying it can charge a 3000mAh battery twice plays nice with that calculation.
One thing to note though and like I said, great for indoor use but if you look at the spec sheet, you can see the capacity vs temperature table.
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tl;dr if you wish to extract every little ounce of power you can from these cells (or this power bank)
if you go hiking in really cold weather, make sure it stays close to room temp (25C), so not in the outermost compartment of your backpack but neither touching your body which could then warm it up higher than room temp - no es bueno.
if it's a really warm, sunny summer day and you go have a beer outside sitting in the porch, don't leave the power bank in direct sunlight, place it in shade instead
This is pretty much business as usual and has to do with the design of the cell and cathode material used.
Cells [like the -26H] intended for laptops, power banks etc. are going to have different discharge characteristics compared to cells [like INR18650-25R] intended for electric vehicles, power tools and so on.
So it's good that the power bank has an aluminium chassis. It's going to be able to dump some of that heat generated by the boost circuitry in to the air and so on and so forth.
The cells themselves won't really heat up that much. You know, there's 4 of them in there and they are in parallel = current load is being split pretty much equally.
At 3V under load which is pretty close to fully discharged (cut-off = ~2.75V), if the power bank circuitry is prodiving 18 watts of power and drawing 21.6 watts (18+20%) from the 1S4P battery pack because of inefficiencies, it would still be just 7.2A of current total and 1.8A per cell.
Well within the capabilities of these Samsung cells and so low power wise per cell they're not heating up much.

I recently added this one to my arsenal and now prefer it over others I have. I can charge it off anyone's charger i'm with on longer trips so cable management is nill. Love the fact you can tell it's in qc mode versus normal charge mode.

Just recently got this power bank for my hTc 10 - as from my experience 10Ah looks impressive on the computer screen - but in real life we actually need 20Ah backup battery .. ?
Spoiler
And it states that output is 12V x 1.5A what actually implies 18W... ?
Sent from quite brutal hTc 10 ..

dottat said:
I recently added this one to my arsenal and now prefer it over others I have. I can charge it off anyone's charger i'm with on longer trips so cable management is nill.
Click to expand...
Click to collapse
Well, not exactly nil, right? You can charge from micro-usb or from lightning, which is a great addition, but you can't actually charge from the cable you're most likely to be carrying with your HTC 10, which is a USB C cable, right? I looked at the description on Amazon, and thought that was an interesting omission.

Andyw2100 said:
Well, not exactly nil, right? You can charge from micro-usb or from lightning, which is a great addition, but you can't actually charge from the cable you're most likely to be carrying with your HTC 10, which is a USB C cable, right? I looked at the description on Amazon, and thought that was an interesting omission.
Click to expand...
Click to collapse
It can be charged via a microusb cable that is included. Since they are as common as can be I don't see how that would be an issue. I have piles of them laying around, spare one in my car etc.. I know it's not ideal to have more than one type of cable, but I use them to charge my S7 Edge, Bose QC 20's , LG Tone Platinum's etc.. that's why I personally have them just about everywhere. I also have a time of Type-C, C-C/A-C cables because of my Nexus 6P. Ideally I would like 4 type c poets for in/out but no one makes anything close yet.

Pilz said:
It can be charged via a microusb cable that is included. Since they are as common as can be I don't see how that would be an issue. I have piles of them laying around, spare one in my car etc.. I know it's not ideal to have more than one type of cable, but I use them to charge my S7 Edge, Bose QC 20's , LG Tone Platinum's etc.. that's why I personally have them just about everywhere. I also have a time of Type-C, C-C/A-C cables because of my Nexus 6P. Ideally I would like 4 type c poets for in/out but no one makes anything close yet.
Click to expand...
Click to collapse
I never suggested it would be hard to find a cable to charge the battery pack.
But dottat wrote that cable management issues were nil, so I was merely pointing out that for those of us with HTC 10s that really isn't quite the case, since if we want to travel with a single cable, the single cable we are going to travel with -- a USB C cable -- can't charge the battery. This means bringing two cables, at a minimum.
This was not a huge complaint or indictment of the product. I was just making a point. The product would be even better if it could charge via a USB C cable.

Andyw2100 said:
I never suggested it would be hard to find a cable to charge the battery pack.
But dotat wrote that cable management issues were nil, so I was merely pointing out that for those of us with HTC 10s that really isn't quite the case, since if we want to travel with a single cable, the single cable we are going to travel with -- a USB C cable -- can't charge the battery. This means bringing two cables, at a minimum.
This was not a huge complaint or indictment of the product. I was just making a point. The product would be even better if it could charge via a USB C cable.
Click to expand...
Click to collapse
I completely agree, unfortunately there are only a handful of battery packs that support QC 3.0 and even fewer that offer Type-C (if any yet) on top of that. The interesting part is their QC 2.0 version has a Type-C port to charge the battery along side the microusb. I'm not sure why they changed that (maybe to appeal to a larger crowd), but it's odd nonetheless. I can post a picture of it later today since its 0103 right now so the lighting wouldn't be ideal to see it.

Andyw2100 said:
...dottat wrote that cable management issues were nil, so I was merely pointing out that for those of us with HTC 10s that really isn't quite the case, since if we want to travel with a single cable, the single cable we are going to travel with -- a USB C cable -- can't charge the battery. This means bringing two cables, at a minimum.
Click to expand...
Click to collapse
But within a large company someone is definitely with iPhone - what somehow suggests carrying one more cable.. ?
I opted to carry my original hTc 10 Type C cable and a small interface which converts Type C into the lightning connector.. ?
Sent from quite brutal hTc 10 ..

jauhien said:
But within a large company someone is definitely with iPhone - what somehow suggests carrying one more cable.. ?
I opted to carry my original hTc 10 Type C cable and a small interface which converts Type C into the lightning connector.. ?
Sent from quite brutal hTc 10 ..
Click to expand...
Click to collapse
They make one that charges via Type-C as I mentioned earlier; however, it uses QC 2.0 as opposed to QC 3.0

Has anyone compared this Choetech 10400 QC3 (currently unavailable on Amazon) with the Anker 20000 QC3? Pros? Cons?

what is your favorite fast charger for the le max 2?

Hello guys,
as the title already says I'd like to know what is your favorite charger for the Le Max 2?
Do you guys all think that the OEM charger from LeEco is the best considering the charging speed or did you find even faster solutions?
Curious for your answers!

ANY qc 3.0 charger, i suppose

miskokupuje said:
Hello guys,
as the title already says I'd like to know what is your favorite charger for the Le Max 2?
Do you guys all think that the OEM charger from LeEco is the best considering the charging speed or did you find even faster solutions?
Curious for your answers!
Click to expand...
Click to collapse
Dear collegue. I am yet waiting for my X822. Maybe you could give me some information how long does it take you to fully charge your X820 from 0% and are you satisfied?
regards Olek

If the phone is off, I need about 1h30min. to full charge it when it is not in quick charge. First time I used QC and the phone heated up so that's why I know use the normall method.

For me it takes 1h20min with phone on and the capacity of the battery is correct measured with small USB tool. Fast charging is sometimes 8V and 2.5 A.
Wysłane z mojego Le X822 przy użyciu Tapatalka

got the X822 aka the grey version in transit, couldnt resist it at 222US, ewen thow im not in the market for new mobile, allready pretty satified with the p8max that i like a lot and that dont got any quickcharge tech at all afaik, other then just plain 1.9amp charge cycle., according to my YZXstudio1270 meter, but the 4300mah takes here around 2.15 hour to fill, but slowing down massive the last 5 to 10% like the norm.
that tempo is fine by me, but have also purchased the Vinsic P3 terminator with QC and type C in & out. intended for the X822. seemed reasonable at 28US and with product-specs that shouldnt be to fare for real-world according to reviews.
JUst wondering if you can trick QC3.0 trigger on other devices, got an relative old usb trigger for QC, but no QC phones or at least chargers to check if 9v and 12v can be optainable and be used for ones 12v coreM tablet, just like that and push of an button..
anyway certainly looking forward for my first entry into my first QC device Lemax2 X822 and not least typeC.. LeMax2 lookzs wicked in grey. .:good:

DaneLaw said:
got the X822 aka the grey version in transit, couldnt resist it at 222US, ewen thow im not in the market for new mobile, allready pretty satified with the p8max that i like a lot and that dont got any quickcharge tech at all afaik, other then just plain 1.9amp charge cycle., according to my YZXstudio1270 meter, but the 4300mah takes here around 2.15 hour to fill, but slowing down massive the last 5 to 10% like the norm.
that tempo is fine by me, but have also purchased the Vinsic P3 terminator with QC and type C in & out. intended for the X822. seemed reasonable at 28US and with product-specs that shouldnt be to fare for real-world according to reviews.
JUst wondering if you can trick QC3.0 trigger on other devices, got an relative old usb trigger for QC, but no QC phones or at least chargers to check if 9v and 12v can be optainable and be used for ones 12v coreM tablet, just like that and push of an button..
anyway certainly looking forward for my first entry into my first QC device Lemax2 X822 and not least typeC.. LeMax2 lookzs wicked in grey. .:good:
Click to expand...
Click to collapse
Where you found grey version for 222$?

Schumi_wk said:
If the phone is off, I need about 1h30min. to full charge it when it is not in quick charge. First time I used QC and the phone heated up so that's why I know use the normall method.
Click to expand...
Click to collapse
You are sure that the quick charge is actually off.?
when checking on mine X822 and turning the knob in setting < battery < quick charge' to not active.
it still display the same voltage and above +6v to around 9v dynamic.. (its the same when the phone is off)
its like the "quick charge off function" doesnt do anything at all. (am on stock X822 assume its 16s EUI'build)
if you got an usb-meter, try to measure if the voltage actually stays around usb 5v level when turning the quick charge off. (mine it doesnt on stock QC charger)
// digitalnasarma it was on AliE ref CB.

http://www.banggood.com/Qualcomm-Ce...ith-Power3S-Tech-p-1047935.html?rmmds=myorder - CHARGER
http://www.banggood.com/BlitzWolf-3...3ft1m-Data-Cable-p-1051395.html?rmmds=myorder - CABLE

DaneLaw said:
got the X822 aka the grey version in transit, couldnt resist it at 222US, ewen thow im not in the market for new mobile, allready pretty satified with the p8max that i like a lot and that dont got any quickcharge tech at all afaik, other then just plain 1.9amp charge cycle., according to my YZXstudio1270 meter, but the 4300mah takes here around 2.15 hour to fill, but slowing down massive the last 5 to 10% like the norm.
that tempo is fine by me, but have also purchased the Vinsic P3 terminator with QC and type C in & out. intended for the X822. seemed reasonable at 28US and with product-specs that shouldnt be to fare for real-world according to reviews.
JUst wondering if you can trick QC3.0 trigger on other devices, got an relative old usb trigger for QC, but no QC phones or at least chargers to check if 9v and 12v can be optainable and be used for ones 12v coreM tablet, just like that and push of an button..
anyway certainly looking forward for my first entry into my first QC device Lemax2 X822 and not least typeC.. LeMax2 lookzs wicked in grey. .:good:
Click to expand...
Click to collapse
Hello. Has anybody understand what this guy is writing. He always write muach but I cannot get any clue. Get off with your YZXStudio but just say how values you can achieve charging Le 2 Max with Vinsic Powerbank.

I also ordered the blitzwolf charger and cable.
Gesendet von meinem P9000 mit Tapatalk

We just need a qualcomm quick charge 3 compatible charger right?

Ugreen

is the adapter which was included in the package not quick charge 3.0 ?

Digiboy2010 said:
is the adapter which was included in the package not quick charge 3.0 ?
Click to expand...
Click to collapse
According to qualcomm, it is. My le max 2 shipped with charger EQ-24BUS.
https://www.qualcomm.com/documents/quick-charge-device-list
I'd like a charger for night-time charging. Does anyone know if there are ill effects by leaving your phone on quick charge for extended periods and doing so daily?
And would one risk damaging this phone by using any other 'regular' charger?

Any charger should be safe, just make sure the cable you use has Pullup resistor of 56kΩ, without that 56k chip all kinds of stuff can go wrong. usb A to usb C is a really bad setup and you'll need that chip for protection..

Thanks castuis. Best thing I learned today This (and this thread w/charger links) is good to have.

So Which charger and cable are the best for the price? Original or something else. And where to buy with shiping to EU?

https://plus.google.com/u/0/collection/s0Inv
This is by far the best way to buy cables and chargers. You will learn way more than you ever wanted about USB accessories.
I bought the multi pack of Orzly cables , they are the best, relatively cheap... Sturdy.... And won't burn up your phone/house.
https://plus.google.com/u/0/+BensonLeung/posts/5kADUwQKhY9

Supertacomonkeyexplosion said:
https://plus.google.com/u/0/collection/s0Inv
This is by far the best way to buy cables and chargers. You will learn way more than you ever wanted about USB accessories.
I bought the multi pack of Orzly cables , they are the best, relatively cheap... Sturdy.... And won't burn up your phone/house.
https://plus.google.com/u/0/+BensonLeung/posts/5kADUwQKhY9
Click to expand...
Click to collapse
Right, but those links mostly focus on USB C standard, not QuickCharge 3.0, which I believe technically violates USB C standards. I'd still suggest sticking to cables confirmed to have the correct pull-up resistor, and if you want to use USB power delivery rather than QuickCharge technology you can also stick to chargers and power banks from that list. I think QuickCharge 2.0/3.0 will still charge faster than USB power delivery though, in which you probably won't find them on that list.
In any case, I bought an 1 port Aukey QuickCharge 3.0 car charger and it seems to work well to charge up to 4 amps. I also bought an Aukey 10000 mAh QuickCharge 2.0 power bank, and it too seems to charge my phone at up to 4 amps. Both were bought from Amazon Canada. I use them either with the cable that came with my phone or good micro USB cables and Tronsmart Micro USB to USB C adapters (which have the appropriate pull-up resistor.)