Develop Bugs

[Q] Slow USB Charging in AC outlet

Whenever I plug my Desire in an AC outlet, it charges ridiculously slow. I check the battery status and it says "Charging (USB)" (not AC) and USB Debugging pops up. My wall adapter says it has an output of 1000ma. Is the chord bottle-necking the charging speed or is it the adapter? I am using the chord that came with my phone but I bought a new adapter to fit my countries outlets.

Same problem. I would like a resolution to this also.

There is allready a thread concerning this issue and it has the solution your looking for.

mercianary said:
There is allready a thread concerning this issue and it has the solution your looking for.
Click to expand...
Click to collapse
I have looked on the forums and it should seem like I should get regular AC charging on my Desire. I have a 1000mah charger and I am using the USB cable that came with my phone. I am wondering why I do not. I looked at my USB (fat side) pins and they are shortened. I have included an image of my charger.

if the adaptor says it supports iPhone etc then that is why the USB debugging symbol is coming up.
because that symbol is up it will only charge at 500mA max (the phone thinks it is in a PC, it doesn't wnat toburn out the USB port).
if it is a cheap adaptor, the voltage regulator may be limited to 100mA. thats what happened with me.
either way, in my eyes you have 3 choices.
1. buy a new adaptor
2. put a new voltage regulator in the adaptor (a friend did this for me)
3. use a converter so the adaptor you have will work in your wall.

nzdcoy said:
if the adaptor says it supports iPhone etc then that is why the USB debugging symbol is coming up.
because that symbol is up it will only charge at 500mA max (the phone thinks it is in a PC, it doesn't wnat toburn out the USB port).
if it is a cheap adaptor, the voltage regulator may be limited to 100mA. thats what happened with me.
either way, in my eyes you have 3 choices.
1. buy a new adaptor
2. put a new voltage regulator in the adaptor (a friend did this for me)
3. use a converter so the adaptor you have will work in your wall.
Click to expand...
Click to collapse
O I didn't realize if it was branded to work with iPhone it would charge slowly. Thank you for your help. Next time I'll watch out for a "Works for the iPhoney."

Bump
I would like to know how it ended?
I have a same problem, the only difference is that i have stock HTC AC charger with separate USB cable (stock too). When plugged to AC it shows "charging(USB)". Tried different cables, same result. Tried two different AC adapters, but both were from NOKIA, same result...

This might help your slow charging issue
If the wall charger is causing your phone to charge in a USB state, the charge time will be very long compared to a normal AC charging state which I'm sure you are aware of. A cable called QuickCharge might help. It will enhance USB charging to AC charging. You can find it on Amazon by searching for 'QuickCharge'. It's the 2nd or 3rd item down.

Automobile Quick Charging Solution

What is the best solution for quick charging the Galaxy Nexus in an automobile?

I have started to use 12-220 volt converter so I can use wall chargers.

I have bought a few of the low profile car usb chargers but they were never recognized as an AC charge. Come to find out, it was the USB cable. I bought a usb charging cable from Amazon last week and it goes in the USB charger and the phone does not think it is a USB charge. I have not timed it but it is recognized the same as the wall charger.
http://www.amazon.com/gp/product/B003VYBCAY

ellisz said:
I have bought a few of the low profile car usb chargers but they were never recognized as an AC charge. Come to find out, it was the USB cable. I bought a usb charging cable from Amazon last week and it goes in the USB charger and the phone does not think it is a USB charge. I have not timed it but it is recognized the same as the wall charger.
http://www.amazon.com/gp/product/B003VYBCAY
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Click to collapse
+1 .. this solution has been working great for me, as well.

I've been getting 2.1A car chargers (look for ones for the iPad), most of the ones I had prior to this were 700mA or so and they can't keep up with my 1A phones. Be careful of dual port chargers advertising 2A, they may only be 1A each and may be "optimistic" about that rating. And don't worry about getting one rated for too much current, the Galaxy Nexus won't pull more than an amp no matter what the charger rating.

Some really good solutions here and thank you all for the help.
I'd really hate to use an inventer in my car just to maintain a clean install, so that really isnt an option for me.
Was really hoping to be able to use a off the shelf car charger with the correct pins to trick the GNexus into thinking that it was charging from a USB port, but the above solution should work well with using a socket USB charger.

I've never run into a car adapter that looks like a USB port, including the VZW charger with a spare port or the cheap 2.1A chargers I got from Amazon. My guess is that a charger not built correctly and leaving the data pins open only supports ~500mA anyway. Even if that's not the case I have a moral objection toward buying a cable to fix a design flaw in another cheap product - but that's just me

Grant H said:
Some really good solutions here and thank you all for the help.
I'd really hate to use an inventer in my car just to maintain a clean install, so that really isnt an option for me.
Was really hoping to be able to use a off the shelf car charger with the correct pins to trick the GNexus into thinking that it was charging from a USB port, but the above solution should work well with using a socket USB charger.
Click to expand...
Click to collapse
I've got a charger similar to http://www.ebay.com.au/itm/USB-Car-...ccessories&hash=item4ab18358f4#ht_1638wt_1392
All I had to do was undo the screws at the top, put a bit of solder between the middle usb pins, and my phone recognises it as a AC source rather than USB.

There has got to be a standard car charger on the market with the middle usb pins already soldiered!
I found this on Amazon which advertises itself as a rapid charging device.
http://www.amazon.com/gp/product/B000S5Q9CA

Grant H said:
What is the best solution for quick charging the Galaxy Nexus in an automobile?
Click to expand...
Click to collapse
Make sure the charger has the IC (rapid) chip. I use this one:
http://www.amazon.com/Motorola-Vehicle-Adapter-micro-USB-Charger/dp/B000S5Q9CA

I've heard that Motorola one mentioned a lot as a good one.
The nice thing about having the low-profile usb plug is (a) it is low profile, (b) I can use it to charge other devices. The charge-only cable is only about $4, so I had no issues buying it to work with this to charge as an AC charge over a USB charge.

Grant H said:
There has got to be a standard car charger on the market with the middle usb pins already soldiered!
I found this on Amazon which advertises itself as a rapid charging device.
http://www.amazon.com/gp/product/B000S5Q9CA
Click to expand...
Click to collapse
I have this one and it charges just like it does from the home outlet and its says "AC" charging. I bought another 8 for family and friends and they all love it.

I think I've figured out the disconnect, I've run into chargers that appear as a USB host which limits the charging to 500mA on previous phones I've had.
You guys are concerned about USB vs. AC charging mode. Of the chargers I've got, this one lists as AC while the rest as USB. However, the fact that the other chargers all work just fine keeping up with GPS+streaming music indicates that the USB vs. AC really has no bearing on the charge current delivered. I'd stay away from charge-only cables just because they'll get mixed in with your standard USB cables and you'll knock yourself out wondering why they don't work. On the other hand, if you really want AC in your battery info order the one I linked.

I keep it in my car... i think I've heard on other threads that USB charging doesn't keep up with GPS (for Directions). Any verify?
Sent from my Galaxy Nexus using XDA App

TheKaz said:
I keep it in my car... i think I've heard on other threads that USB charging doesn't keep up with GPS (for Directions). Any verify?
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
What's much more important is the rating on the power source. The GN can pull up to 1000mA, if your charger is only rated for 800mA (like many car chargers) it doesn't matter if it's in AC mode.

jdbower said:
What's much more important is the rating on the power source. The GN can pull up to 1000mA, if your charger is only rated for 800mA (like many car chargers) it doesn't matter if it's in AC mode.
Click to expand...
Click to collapse
makes sense.. the one I use has dual usb (1.0 and 2.1)

You went and gave me a project for the weekend, and once again science prevails over anecdotal evidence. I took each of my 5 chargers and hooked them up to a 12V power supply that measures current. I then recorded whether the charger reported AC or USB, for the ones with USB I modified a right-angle adapter to short out the data pins, and I measured the current. The contenders:
Verizon Wireless Dual Charger
XTG Dual Port Charger
Griffen Powerjolt Dual USB Charger
Griffen Portjolt Micro
CostMad Dual USB Charger
The VZW model was USB out the external port as I had tested before, however AC out the built-in cable which I hadn't bothered to test. It pulled 0.25A @12V via the USB port and 0.59A via the cable. Hmmm... A hole develops in my previous observation. While I had used this on a long car trip with no issues, it was via the built-in cable.
The XTG was new, I hadn't used it before as it's in the car I rarely drive. It reported USB and 0.22A. With the adapter to make it report AC it pulled 0.48A.
The pattern was set. I had expected the Griffen adapters to be built more appropriately but the dual charger reported 0.22A without the adapter and 0.42A with. I had used this without losing charge in the past so this was surprising to me, but it's possible I just wasn't drawing as much current because the screen was dimmer or something.
The compact Griffen adapter (which is great for a laptop bag, BTW) pulled 0.21A and 0.47A respectively.
The cheap CostMad adapter was the only one that performed well out of the box, both reporting AC and pulled 0.57A.
In theory, a perfect adapter should pull 0.42A. Anything more is waste, anything less means it's not keeping up. I have doubts about the Griffen 2x allowing for a full amp, but the VZW and CostMad chargers are pretty lossy. What's even worse is that I'm pretty sure the VZW charger is rated for 800mA (but I can't find an actual spec on it) which would mean that it pulled the most power for the least current. Not that this really matters unless you've got an electric car.
Sorry for misleading you earlier, I should have checked the other port of the known-good VZW charger and probably doublechecked the numbers on my other "known good" charger. Still hating cables that work for charging but not for data, I ended up modifying each of the chargers to short the middle pins (except for the VZW one). If I didn't have the soldering iron for this, I probably would have gone for some of these instead.

Grant H said:
There has got to be a standard car charger on the market with the middle usb pins already soldiered!
I found this on Amazon which advertises itself as a rapid charging device.
http://www.amazon.com/gp/product/B000S5Q9CA
Click to expand...
Click to collapse
CyberPunk7t9 said:
Make sure the charger has the IC (rapid) chip. I use this one:
http://www.amazon.com/Motorola-Vehicle-Adapter-micro-USB-Charger/dp/B000S5Q9CA
Click to expand...
Click to collapse
I'm using the same one and it works perfect. Charges even when GPS navigation is running.
Make sure you select Amazon as the seller though. I heard there are a lot of fake ones.

Grant H said:
There has got to be a standard car charger on the market with the middle usb pins already soldiered!
I found this on Amazon which advertises itself as a rapid charging device.
http://www.amazon.com/gp/product/B000S5Q9CA
Click to expand...
Click to collapse
+1 to those recommending this one. I have this exact model and it does indeed charge at the "AC" rate, about twice as fast as the "USB" rate.

TheKaz said:
I keep it in my car... i think I've heard on other threads that USB charging doesn't keep up with GPS (for Directions). Any verify?
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
The Motorola one will charge even when using GPS. I have a friend I bought one for that uses his GPS all day and loves the Motorola charger.

[Q] Samsung Galaxy Sx family chargers compatibility

Hi,
I'm in deep sh*t, I lost a part of my luggage, where all the chargers for my phones and my laptop and the data cable for my SGS2...
In order to save on buying both a charger and a data cable (as on SGS2, they are separate), I'd like to ask, whether I could buy an
SGS4 charger ? Would it not do any harm to my batter on the long haul ? I know that the SGS4 charger is made of a USB data cable,
which is then plugged just in a socket connector...
Thanks!

darkman088 said:
Hi,
I'm in deep sh*t, I lost a part of my luggage, where all the chargers for my phones and my laptop and the data cable for my SGS2...
In order to save on buying both a charger and a data cable (as on SGS2, they are separate), I'd like to ask, whether I could buy an
SGS4 charger ? Would it not do any harm to my batter on the long haul ? I know that the SGS4 charger is made of a USB data cable,
which is then plugged just in a socket connector...
Thanks!
Click to expand...
Click to collapse
my understanding is that so long as the output voltage is the same (5.0V) and the max output current on the charger is rated 0.7A (or above), you should be in good shape. I even occasionally use my ipad usb charger + usb data cable to charge my s2.

Yea most USB chargers should be fine. Heck, I'm using a $7 generic one I got from a local store because mine always break and it works fine.

I agree with Bigtonyman, using most microUSB charger is fine. Only output voltage must be 5V
I am charging daily my SII with: original charger 700mA (home), Nokia charger 950mA (parents) and occasionaly with china car lighter charger 1000mA, and from computer USB port.
I have my original battery 1,5 year old, and the battery time is similar to when it was new.

[Q] EU Charging methods

I live in Finland and just ordered the Nexus 7 (2013) from the US. I just realized we have different electric plugs and won't be able to use the default charger without an adapter. Couple of questions:
1) I have two miniusb smartphone chargers. The HTC charger says "Output: 5V = 1A" and the Nokia one "Output: DC 5.0W 1200mA". Will I be able to use these to charge the Nexus 7?
2) I think it's possible to simply use a piece to change the US plug type into the Finnish one since the adapter supports universal voltage and amperage ranges. Will this be the safest and most efficient way to charge?
3) It's possible to use a computer as USB power source. Will this work and how does this method compare efficiency/safety wise to 1) and 2)?
Update: support.google.com/nexus/7/answer/3257354?hl=en
The input voltage range between the wall outlet and this charging unit is AC 100V–240V, and the charging unit’s output voltage is DC 5.2V, 1.35A.
Click to expand...
Click to collapse
Your Nexus 7 can be charged via the USB port on a computer only when Nexus 7 is in sleep mode (screen off) or turned off. Charging through the USB port will take longer than charging with the USB charging unit.
Click to expand...
Click to collapse
4) Wireless charging looks sexy, but how does it compare to 1, 2 and 3? Any recommendations in that regard?
Update: Wireless charging has a speed penalty and the chargers seem to be quite expensive.

Your Nexus 7 will be fine with any USB charger. I have tested mine on 3 different chragers with US, UK, and EU voltage. My USB chargers all say 100-240v. I know EU and UK is 240v. So yes you will be fine with any usb charger.

As far as I know, all micro-USB chargers can take an input voltage of around 120-240 V, which it what you'll find pretty much everywhere in the world, and supply 5 V to the device, so no need to worry about that. The only difference between cables is how much current they can carry, but your battery will only suck as much as it needs to (unless it's limited by the cable, of course), so there is no way more current could go into it then it is safe.
I have also bought my N7 in the US and use it in Europe and charging it by using an adapter to convert from the US plug to the EU one works just fine.
Connecting it to the USB port on your computer will only give about half the current, which is why they say you should keep it off while charging. It will take about twice as long as using a wall charger and there is no gain in battery health. However, if you want to actively use the device, the current supplied by your PC may be less than how much the tablet is using, which will result in an overall (slower than usual) discharge.
I can't say anything about wireless charging, as I've never used it and I'm not planning on starting now.
tl;dr: Use any USB charger on any of your devices, no harm will be caused. The only difference that could show up is charging speed. :good:

[Q] Need a new charger - where should I look for a good one?

Hi.
Two questions:
1. Where should I look for one?
Found this on Ali-express but wanted your opinion:
http://bit.ly/2ze7U2U
2. Regarding the cable: are all cables the same? Or is this (in link - the one that comes with the OPO) different (can move more current)?
Trying to save where I can
Thank you!

benyben123 said:
Hi.
Two questions:
1. Where should I look for one?
Found this on Ali-express but wanted your opinion:
http://bit.ly/2ze7U2U
2. Regarding the cable: are all cables the same? Or is this (in link - the one that comes with the OPO) different (can move more current)?
Trying to save where I can
Thank you!
Click to expand...
Click to collapse
I recommend using original charger and cable.
https://m.ebay.com/itm/Original-OEM...%3A6a5fb7c815f0aca4b4ac59a8fffbc199%7Ciid%3A6

Mr.Ak said:
I recommend using original charger and cable.
https://m.ebay.com/itm/Original-OEM...%3A6a5fb7c815f0aca4b4ac59a8fffbc199%7Ciid%3A6
Click to expand...
Click to collapse
Thank you so much for this.
Are you the only one answering questions?
Thanks!

Truth be told you can use any charger or cable on opo as long as the cable support fast charge...i have been using Nokia charger, Xiaomi charger, apple charger and samsung charger combine with original opo cable, xiaomi cable, remax cable and samsung cable and none of them give any problem on my opo...

iPusak Gaoq™ said:
Truth be told you can use any charger or cable on opo as long as the cable support fast charge...i have been using Nokia charger, Xiaomi charger, apple charger and samsung charger combine with original opo cable, xiaomi cable, remax cable and samsung cable and none of them give any problem on my opo...
Click to expand...
Click to collapse
Thank you for this.
I have been using a 5V 2.1A charger (from Belkin) but with a "regular" old Samsung micro-usb cable and it took 6 hours to charge till full.
I can't imagine it's right.
Perhaps a new, more powerful cable?
Also, how long should it take to fully charge the One?
Thank you!!! :good:

benyben123 said:
Thank you for this.
I have been using a 5V 2.1A charger (from Belkin) but with a "regular" old Samsung micro-usb cable and it took 6 hours to charge till full.
I can't imagine it's right.
Perhaps a new, more powerful cable?
Also, how long should it take to fully charge the One?
Thank you!!! :good:
Click to expand...
Click to collapse
if you use cable that support fast charge you can charge your phone less then 2 hour...just get a cable that support fast charge or support quick charge 2.0 and you will see the difference....

getting a good cable makes all the difference. I'm not sure if it is due to Lineage, firmware or the kernel... but my OPO has been very picky with the charging cable for at least the last 9 months. I first noticed this when my Jaybird Bluebuds X flat short cable charged significantly faster (then i lost the cable). then on some cables, it would say it's charging but the percentage would remain constant or even drop at a slower rate! I then tried different cables and charger combinations using the the AccuBattery app and OPO Charging Current app to note the ampere.
the xiaomi fast charging micro usb 1.2m flat cable is cheap and charges "fast". I highly recommend the xiaomi cable (i even bought like 4 of them for the office and for home).
paired with new-ish samsung quick charge chargers (which came with the S7 and C5 Pro that i had lying around), i get about 1.58A (screen off).... i also get comparable results with an old Samsung Galaxy Tab 10.1 charger from like 2011 and an ipad 3 charger.

-SKYLINE- said:
getting a good cable makes all the difference. I'm not sure if it is due to Lineage, firmware or the kernel... but my OPO has been very picky with the charging cable for at least the last 9 months. I first noticed this when my Jaybird Bluebuds X flat short cable charged significantly faster (then i lost the cable). then on some cables, it would say it's charging but the percentage would remain constant or even drop at a slower rate! I then tried different cables and charger combinations using the the AccuBattery app and OPO Charging Current app to note the ampere.
the xiaomi fast charging micro usb 1.2m flat cable is cheap and charges "fast". I highly recommend the xiaomi cable (i even bought like 4 of them for the office and for home).
paired with new-ish samsung quick charge chargers (which came with the S7 and C5 Pro that i had lying around), i get about 1.58A (screen off).... i also get comparable results with an old Samsung Galaxy Tab 10.1 charger from like 2011 and an ipad 3 charger.
Click to expand...
Click to collapse
Thank you all for the great information!!!
Are you guys approve of this cable:
https://www.aliexpress.com/item/Mic...lgo_pvid=66a80ce9-a9b2-454e-baa8-44c3ccb87354

well I went with blitzwolf ...I don't use my original charger as blitzwolf is faster(just a tad but still) ...BW-S5 is my main and I've ordered an BW-S9(I'll make BW-S5 a second to charge my phone in my shop and also charge clients phones/tablets if needed - I fix them too)
BW-S5 has an extended review from a dude with all the pros and cons ...great review if you want to look at it(he'll do the S9 as well but didn't receive it yet and I couldn't wait, I needed a good 2nd one)
P.S. Using custom cable made by me to avoid getting slow charges(only power cable, no data - for safety too)

I'm on this charger: http://s.aliexpress.com/qeaIfIrE and reversible micro USB cable from the same manufacturer (reversible micro usb seems to be not available to buy any longer though, I can see regular micro usb only)
Both are excellent.

Reccomend a Anker Charger
Anker makes good chargers..

evronetwork said:
P.S. Using custom cable made by me to avoid getting slow charges(only power cable, no data - for safety too)
Click to expand...
Click to collapse
Can we hear more about your custom cable?

Chotech SMT0008 5V/2.4A charger
Hi anybody who want to use a longer cable (1.8m -3m) without losing the charging speed, I would recommend Chotech SMT0008 5V/2.4A charger. You would be able to increase the charging speed up to 10-15%.
https://www.aliexpress.com/item/CHO...er-for-iPhone-Samsung-Xiaomi/32742790687.html
This charger can supply up to 5.5V to compensate USB cable resistance (especially when using a longer cable).
https://lygte-info.dk/review/USBpower Choetech usb 5V 2.4A SMT0008 UK.html
Don't forget a good quality cable as well for fast charging. Up to 1.5m 22AWG is OK, but over 1.5m get a 20-21 AWG cable. If you want to learn about cable resistance during charging the below article is helpful.
https://goughlui.com/2014/10/01/usb-cable-resistance-why-your-phonetablet-might-be-charging-slow/
I myself use Chotech SMT0008 5V/2.4A with a Tronsmart 20AWG 1.8m cable. I have tested some cables: Mageek 21AWG 3m, Blitzwolf 21AWG 1.8m, Ugreen 22AWG 1.5m all of them are OK. Avoid VoxLink cables !! their "fast cable" uses fake 24-28AWG!