Develop Bugs

Check mA of your Nexus charger

Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Do you think I have a problem with my Nexus charger ?
Can anyone use the widget (drag from widgets to home while charging and set update interval at 1s) and share results what are you getting ?
I would be very thankful!
Update : My new nexus charger has 1.35 and gives 1.1A while my phone charger of .850 A gives 750mA.
Nexus 7 2012 gives 1.7-2.0 A

Hnk1 said:
Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Do you think I have a problem with my Nexus charger ?
Can anyone use the widget (drag from widgets to home while charging and set update interval at 1s) and share results what are you getting ?
I would be very thankful!
Click to expand...
Click to collapse
Did you try your experiment with a dedicated charging cable?
If I understand the issue correctly, using a sync cable for charging redirects some of the charging current for other purposes.

douger1957 said:
Did you try your experiment with a dedicated charging cable?
If I understand the issue correctly, using a sync cable for charging redirects some of the charging current for other purposes.
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Click to collapse
No, I havenot. Just the official Nexus cables and Xperia Cable. Xperia has built in fast charging as far as I know

Hnk1 said:
No, I havenot. Just the official Nexus cables and Xperia Cable. Xperia has built in fast charging as far as I know
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What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app

LinearEquation said:
What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
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Click to collapse
But try to charge N7 in car while using GPS with 700mA-800mA car adapter. You will get discharging, not charging, so you must use 2000mA. I recommend to use 2.1A for car(I am traveling a lot and never got disappointed), and normal 2.0 for AC charging.(5.0V)
Sent from my Nexus 7 using XDA Premium 4 mobile app

milleringer said:
But try to charge N7 in car while using GPS with 700mA-800mA car adapter. You will get discharging, not charging, so you must use 2000mA. I recommend to use 2.1A for car(I am traveling a lot and never got disappointed), and normal 2.0 for AC charging.(5.0V)
Sent from my Nexus 7 using XDA Premium 4 mobile app
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The OP did not specify with GPS in the car. But for that I use this in the car while storm chasing http://www.amazon.com/gp/product/B0088U4YAG/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1 20 Watt 4.2 Amp. I use GPS all the time and the Asus and Amazon bricks charge just fine while using GPS.
Still the tablet has to command the Amps it wants. This is decided in part by the Watts in the charging adaptor/brick. You can have a power supply with all the current capabilities in the world and it won't mean a thing without Power, Voltage and demand for Amps from said tablet/phone.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app

LinearEquation said:
What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
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Click to collapse
I don't believe that's possible. It's my understanding that charging circuits are "smart," in that they'll "take" a voltage and current that tends to maximize battery life and endurance, with thermal limiting to guard against overheating. I think the profile is for the current and voltage to taper off a bit as the battery reaches full charge. Some devices do this better than others, but that's the basic principle.
The charger itself is regulated. The regulator maintains a set voltage, in this case 5.0 VDC. As the device's power requirements increase, the decrease in voltage at the regulator allows an increase in current to maintain the set voltage. Once the device's draw reaches the capacity of the charger, the battery takes over, because the charger can no longer maintain the required voltage. In other words, a 2 amp charger isn't constantly shooting 2 amps to the device unless the device is demanding that much current.
On the subject of chargers, we're not talking about laboratory grade here. Your 2 amp charger may or may not be able to actually produce 2 amps, much as the actual output voltage may not be exactly five volts. It's also important to note in the discussion that device batteries aren't rated at five volts, but something less. 4.5-4.7 is a common range.

Hnk1 said:
Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Click to expand...
Click to collapse
Are you sure your Nexus charger is 2.0A? I think the 2012 charger was rated for 2A out, but my Nex7 (2013) charger lists 1.35A output on its nameplate.
Either way, could be that the 2013 Nex7 is configured not to draw a lot of current, generally this is for thermal management.

LinearEquation said:
0
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milleringer said:
1
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douger1957 said:
2
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arkolbus said:
Are you sure your Nexus charger is 2.0A? I think the 2012 charger was rated for 2A out, but my Nex7 (2013) charger lists 1.35A output on its nameplate.
Click to expand...
Click to collapse
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
I did few tests, asked my dad who is an Electrical Engineer and came to the following conclusions.
When I'm charging my phone/tablet ; say I'm using 1A, the power given would be around 850-900mA . The power be always less than rated.
If I'm using my phone and charging with same 1A charger, and the power used by my phone is 500mA, I would only see 350-400mA power given to battery as net because the power given would be subtracted from power being used.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
If charge power is less than usage of device, you would see discharge of device. In this case using a high power charger would charge the device but still it would damage the battery.
Basically, there is a safety factor of a device/battery. So if more current flows into it, lets say it can withstand 1.2 A and came with 1A charger. Using 1.3A or higher would damage the device/battery nonetheless.
I hope this helps and thank you for all your opinions and suggestions

Hnk1 said:
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
Click to expand...
Click to collapse
Glad we got to the root of your issue.
There are a couple of misconceptions though:
All things being equal, you are correct that charging at higher current will produce more heat and will generally reduce battery lifespan. It is not likely that you will damage the device by using a higher-capacity charger (unless it is some cheap knock-off charger, but those are dangerous regardless of capacity). The charger is not "constant current", meaning it does not always supply the full current, only what the device requests. Some of the supply current gets used to power the device, and some goes to the charging circuit.
The charging circuit limits the amount of current going to the battery based on how full the battery is (fast charge up to a certain charge % or cell voltage, then slow charge to ~100%), the battery temperature (if temperature is too high, reduce charge rate), and some maximum current (depending on the charge circuitry, battery ratings, design decisions, etc). edit: If you use a (quality) 2A charger, one of two things will happen: either your device will charge faster and you may reduce your battery lifespan, or the charging circuit will still limit the current to some lower limit (like 1.35A), and nothing will change. You are not really at any risk of causing device failure.
Also, there are not "more electrons" in the battery. The number of electrons stays the same, since current must flow in a loop. What changes is the energy state of those electrons. When slow-charging (constant voltage charging), as the battery is charged its voltage rises towards the constant charging voltage. The difference between the charging voltage and the battery voltage drives the amount of current, so as that difference gets smaller the amount of current decreases towards zero per ohm's law.

Hnk1 said:
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
I did few tests, asked my dad who is an Electrical Engineer and came to the following conclusions.
When I'm charging my phone/tablet ; say I'm using 1A, the power given would be around 850-900mA . The power be always less than rated.
If I'm using my phone and charging with same 1A charger, and the power used by my phone is 500mA, I would only see 350-400mA power given to battery as net because the power given would be subtracted from power being used.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
If charge power is less than usage of device, you would see discharge of device. In this case using a high power charger would charge the device but still it would damage the battery.
Basically, there is a safety factor of a device/battery. So if more current flows into it, lets say it can withstand 1.2 A and came with 1A charger. Using 1.3A or higher would damage the device/battery nonetheless.
I hope this helps and thank you for all your opinions and suggestions
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Click to collapse
I think that would be true... if there weren't a charging profile built into the unit. That profile has the most "juice" going to the battery below a certain charge state. It tapers off as the battery reaches the fully charged state. On some newer devices the batteries contain electronics that help things along. There is certainly thermal limits built in, and at any rate, on higher quality devices at least, only so much current is used for charging. It'll charge at whatever current level the manufacturer has designed and no more, even if more current is available.
And you're correct in that while the device is charging, some current is used for charging while surplus current, if available goes to the running device. Once the device's battery reaches a full charge, the full charger current is available to run the device. If the charger is capable of providing the current needed to serve the device's needs, life is good. Otherwise, the cycle begins again.
Generally speaking, so long as you're not flogging your device by taxing the CPU and or GPU, a 2 amp charger should be sufficient to run say, a music program and a nav program using the GPS. Plug an OTG cable in and start hanging peripherals off of the dongle and all bets are off.

UCH10 Fast charging not working

I have just bought the UCH10 from Sony to try out on the fast charging, its seems charging at the same rate as a regular 2.1A Charger.. Anyone facing this issue?

finoqq84 said:
I have just bought the UCH10 from Sony to try out on the fast charging, its seems charging at the same rate as a regular 2.1A Charger.. Anyone facing this issue?
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Click to collapse
I don't know about the UCH10, but I know with my Powergen charger I see it going into HV (fast charge) mode. (The charger I have has an indicator for when it's in 9v mode).
However, I have noticed this device's thermal throttling is pretty aggressive. You need to let the thing idle if you expect it to charge at any reasonable rate thanks to the Snapdragon 810 being a power hog.

Confimed the UCh10 charger fast charge working
Only got 13% from 1% for 15mins
What happened!!

Mine came with the UCH10 charger and am using my short Sony usb cable that came with my headset (EC300). I went from 4% to 100% in 1 hour and 35 mins. At the end of the day with my bluetooth headset and smart watch conneted all day (12 hours) moderate use emails,mms,calls. I have about 42% remaining. It only seams to be getting better with each charge. Today it went from 5% to 100% in 1 hour and 22 mins.

Perheps Sony's fast charging is to speed up overall charging at a faster rate. As i was from Note 5, its charging takes only 10 mins to jump from 5% to 38%!!
Perheps they are both using different fast charging tech?

finoqq84 said:
Perheps Sony's fast charging is to speed up overall charging at a faster rate. As i was from Note 5, its charging takes only 10 mins to jump from 5% to 38%!!
Perheps they are both using different fast charging tech?
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Click to collapse
Both are using the same under different names. Samsung named it "Adaptive fast charging" and the rest use qualcomm's name "Quick charge".
For example mine is in the box with standard 1.5 normal charger, but I am using the charger from my dead note 4 (yes it is a quick charger one) which is charging z5p at the same speed like my note 4. Also I am monittoring the charge rate, and I can confirm that samis Adaptive charger charging at max using qualcomm's quick charge standard our z5p devices.
Edit:
If note 5 charging so fast it must be another tech from Samsung (or wrong battery stats - believe me I experienced these few times on my note 4 during flashing AOSP roms).
Cheers
Edit 2:
I can remember that note 4 when stock (tw) is charging much more aggressively during initial charge (upto around 50%, and then it just slow down), while AOSP is fast charging constantly (lower rate compared to samis stock tw rom) but use quck charge upto 90-95%.. It is a setting at the end. Yoi can force set this with custom kernel.

Charging amperage and voltage.

According to Ampere, the phone is charging at 1100mah and 4v with the factory cable and adapter. Battery is at 20% when I started. Are those numbers right because It seems like the fast charge should be higher. It does say "Fast charging" on the lock screen.

Fuzzy13 said:
According to Ampere, the phone is charging at 1100mah and 4v with the factory cable and adapter. Battery is at 20% when I started. Are those numbers right because It seems like the fast charge should be higher. It does say "Fast charging" on the lock screen.
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Click to collapse
I don't have the p2xl...I have a 6p but my phone starts off allow when fast charging with the OEM charger. But after a couple minutes it ramps up to around 2200mAh..... It's like it had to warm up a bit...... Does yours do that?

Fuzzy13 said:
According to Ampere, the phone is charging at 1100mah and 4v with the factory cable and adapter. Battery is at 20% when I started. Are those numbers right because It seems like the fast charge should be higher. It does say "Fast charging" on the lock screen.
Click to expand...
Click to collapse
That's not fast charging and no, that's not ok.... it looks like the charging rate may be capped at 10.5W. If true, this is not cool.

Fuzzy13 said:
According to Ampere, the phone is charging at 1100mah and 4v with the factory cable and adapter. Battery is at 20% when I started. Are those numbers right because It seems like the fast charge should be higher. It does say "Fast charging" on the lock screen.
Click to expand...
Click to collapse
This topic has come up before. Personally, I don't think the app is reading the actual input. If it was measuring somewhere on the input line it wouldn't show the discharge rate when the charger is disconnected. So wherever it is measuring is not designed to measure what is coming in from the charger. Fast charging is 9v at 2 amps. There is probably some special circuit getting it to the battery and not into the phone guts, which are running at 5v.
If you have doubt that it is fast charging, just try timing recharging time with different adapters.
On Ampere, mine shows 5v at 1 amp for every charger including stock, other than a 1 amp charger. For that, it'll show 4v at 1 amp. But the actual charging time with the stock charger is much faster than using a 5v at 2.4 amp charger. If you get a similar recharge rate with a 1 amp charger and the stock charger, then Ampere would be correct. But it should be a much different recharge time.
If someone uses an inline module in between the charger and phone, then that'll get my attention. But I haven't seen where someone has done that. Supposedly someone has done that, but no one has linked to any post in the prior thread about this.

Voicebox said:
This topic has come up before. Personally, I don't think the app is reading the actual input. If it was measuring somewhere on the input line it wouldn't show the discharge rate when the charger is disconnected. So wherever it is measuring is not designed to measure what is coming in from the charger. Fast charging is 9v at 2 amps. There is probably some special circuit getting it to the battery and not into the phone guts, which are running at 5v.
If you have doubt that it is fast charging, just try timing recharging time with different adapters.
On Ampere, mine shows 5v at 1 amp for every charger including stock, other than a 1 amp charger. For that, it'll show 4v at 1 amp. But the actual charging time with the stock charger is much faster than using a 5v at 2.4 amp charger. If you get a similar recharge rate with a 1 amp charger and the stock charger, then Ampere would be correct. But it should be a much different recharge time.
If someone uses an inline module in between the charger and phone, then that'll get my attention. But I haven't seen where someone has done that. Supposedly someone has done that, but no one has linked to any post in the prior thread about this.
Click to expand...
Click to collapse
Ah, so you didn't read the linked XDA article by Nathan K. but commented in this way?

Ampere is giving you the charge with your battery drain. You're supposed to measure what your drain is in the app without plugging in the charger, then add that to your measurement when you plug it in. You will be somewhere around 1500mah at that point (400-500mah drain).
That is because android limits your charge rate when the screen is on to 1500ma. Your phone will charge faster with the screen off, that is for the thermal throttling. Ampere can't measure with the screen off. Use accubattery to see that, you'll need to leave the screen off for 5-10 minutes to get an accurate reading.

v12xke said:
Ah, so you didn't read the linked XDA article by Nathan K. but commented in this way?
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Click to collapse
No. I have no idea who Nathan k is. No one has pointed me to wherever he posts. They just keep telling his name as if everyone knows who he is. Paste a link.
Edit: Here's where I saw it before, and I did try to find him on Google +. I wasn't told there was an XDA article.
https://forum.xda-developers.com/showpost.php?p=74519553&postcount=13

Voicebox said:
No. I have no idea who Nathan k is. No one has pointed me to wherever he posts. They just keep telling his name as if everyone knows who he is. Paste a link. Edit: Here's where I saw it before, and I did try to find him on Google +. I wasn't told there was an XDA article.
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Click to collapse
Ah okay, well the link to "capping" was in my post just above, but you probably missed it. See the article here. As for who he is... he has been taking over for Benson Leung in testing all things USB-C. His G+ link is in the article. He does a LOT of testing and publishes his findings. :good:

v12xke said:
Ah okay, well the link to "capping" was in my post just above, but you probably missed it. See the article here. As for who he is... he has been taking over for Benson Leung in testing all things USB-C. His G+ link is in the article. He does a LOT of testing and publishes his findings. :good:
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Click to collapse
Ok, thanks. I know about Benson Leung. I had seen the orange color in the text, but in my brain that was highlighting and not a link.
I stopped using the stock charger after about 5 days because I worry about heat and things like the 6P battery issue. But it seems like I don't have to worry so much if they've dropped the charging current for the whole charging time. That also means I can keep using my old 5v at 2.4 amp or 2.0 amp chargers during the day and not miss much since it is going to be charging at about 10 watts either way. It just won't have a few minute start at higher watts. At night I use a 1 amp charger.
I don't blame Google for dropping things down since the 6P is said to have charged at 15 watts and the dying batteries cost them a lot of dollars replacing user's phones. Project Fi even started sending Pixels as replacements when they ran out of 6P refurbs until corporate stopped that practice.
But they do claim "Up to 7 hours of battery on 15 minutes of*charging". Wonder if that was before or after they messed with the charging current. If I wasn't on Project Fi, this would be one more reason not to ever have considered this phone to begin with. I almost never need to rapid charge and then go somewhere away from an outlet, but other people do. I was also forced to buy an external battery since the 5X battery life sucked. So I do have a backup.

Fast charging support?

Can i use my old moto turbo charger for fast charging ?
Which is 12v*1.5amps ..

Tried mine and no same charging speed

You can use it but it won't "fast charge". The Honor 7X isn't a "fast charge" device.
BUT (yes there is always a but), use the provided plug... it's a 2A output. It will charge a little bit faster with it than ith your 1.5A one.

Sadly no fast charging, takes me 3.5-4 hours to charge regardless of what charger I use.
My other phone only takes 1 hour 30 minutes...

Wow..
kanej2006 said:
Sadly no fast charging, takes me 3.5-4 hours to charge regardless of what charger I use.
My other phone only takes 1 hour 30 minutes...
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Click to collapse
In The United States of America BND-L24... You are looking at 2.5 hours max. from 0 to 100%.
I'm usually, 4 hours S.O.T. a day average and still @ 50+ %..... only once have I drained it in 2 long days.. but I pretty much watched a movie.. made a sandwich and it was @ 100% again.

kanej2006 said:
Sadly no fast charging, takes me 3.5-4 hours to charge regardless of what charger I use.
My other phone only takes 1 hour 30 minutes...
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Click to collapse
Carefull to the USB wire you are using. They have not the same caracteristics.
I've bought one without reading... and it can't charge any device faster than... 0.5A... So my new 7X or even my old HONOR 7 just discharge faster than it charge...

patbol1 said:
Carefull to the USB wire you are using. They have not the same caracteristics.
I've bought one without reading... and it can't charge any device faster than... 0.5A... So my new 7X or even my old HONOR 7 just discharge faster than it charge...
Click to expand...
Click to collapse
Yes, you are right in that regard, like trying to force extra charge when it cannot do so.
I did however purchase a new usb cable 2.0A and it does charge slightly faster, around 3 hours instead of 4...

I've lost my honour 7x original charger
Please suggest me which charger should I use

Use 5v 2A charger
Asang jamir said:
I've lost my honour 7x original charger
Please suggest me which charger should I use
Click to expand...
Click to collapse
Use any 5V 2A charger or if available buy ERD 5V 2A charger it would be cheap and best

slow charging

Ok so tmobile lg g8 wont charge up above 980ma current regardless of the charger or cables used and regardless of the battery level. So basically charging at less than 4 watts total. My one plus 6t will do at least 12 to 15 watts low battery charging.
What gives???

You might have a defective unit. I don't have any measurements, but my T-Mobile unit charges quickly with both OEM and third party chargers.

Ok did a test in stock charger took 1 hour 42 minutes to fully charge. Whats anyone else getting?

madcowintucson said:
Ok so tmobile lg g8 wont charge up above 980ma current regardless of the charger or cables used and regardless of the battery level. So basically charging at less than 4 watts total. My one plus 6t will do at least 12 to 15 watts low battery charging.
What gives???
Click to expand...
Click to collapse
Could be the Optimized charging option in Setting/Battery. Uncheck and try again. This will slowly charge the phone to prevent unnecessary overheat and prolong the battery lifespan.

That option was turned off

madcowintucson said:
Ok did a test in stock charger took 1 hour 42 minutes to fully charge. Whats anyone else getting?
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Click to collapse
Hi
I've not got the phone but as the charger isn't a proprietary one like Huawei and OnePlus the average charging time is about right. I had the HTC U11+ which had the same charger Quick Charge 3.0 and took over 1 hour 30 to charge.
Currently have an OnePlus 6T and the charger we get will charge the phone in over an hour.

madcowintucson said:
Ok so tmobile lg g8 wont charge up above 980ma current regardless of the charger or cables used and regardless of the battery level. So basically charging at less than 4 watts total. My one plus 6t will do at least 12 to 15 watts low battery charging.
What gives???
Click to expand...
Click to collapse
Are you measuring the charge rate with the screen on? If so then that's your problem. Charging is limited to 5W when the screen is on to limit heat buildup. You'll need something like 3C battery monitor to record the rate when the screen is off. I've attached an example of my V40 charging on my Anker Powerwave 7.5 stand. With a wired fast charger it tops out at 2600ma.View attachment 4750253
Sent from my LM-V405 using Tapatalk