Develop Bugs

Charging via USB on computer

My device charges very slowly if the display is off. If the display is on it does not charge at all.
I've installed the Samsung drivers from the website. Is anyone else able to charge their device via USB? I need to know if I should exchange mine.
Sent from my SGH-T989 using XDA App

I was able to charge my sgs2 yesterday at work through the usb port. It might be the phone, or maybe the usb port you are trying to use doesn't have enough juice to charge the phone? have you tried another usb port on the computer?

usb will always charge really slow compared to an wall outlet

Yes I have tried multiple ports, computers, and cables. Oh well, I guess I'll live with it.
Sent from my SGH-T989 using XDA App

+1
dimitrie said:
usb will always charge really slow compared to an wall outlet
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what he said
if you want fast charging, do it from a wall outlet

jasontx said:
My device charges very slowly if the display is off. If the display is on it does not charge at all.
I've installed the Samsung drivers from the website. Is anyone else able to charge their device via USB? I need to know if I should exchange mine.
Sent from my SGH-T989 using XDA App
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USB supplies max 500mA. Is probably half what the wall charger is giving you. Nexus S is only 750. My guess gsII is 1000 (1A). iPad charger is 2A.
Edit: no a higher power one than the stock charger won't charge the phone faster in a noticeable way. Charging circuits in remotely modern phones limit current to that safe max. If they don't you're probably risking damaging your phone.
Sent from my Nexus S using Tapatalk

I understand that the USB on the computer is weaker. I was surprised to see that when the phone was connected to the computer, screen on, and streaming music that my battery was actually reducing slowly. I would expect the opposite and this behavior seems abnormal.
Sent from my SGH-T989 using XDA App

that's exactly the reason why in car i use the 2A charger (2000 mAh), and in house i use 1000 mAh wall charger
if i leave it at the computer USB charging, i've to keep it iddle for it to charge after like... 4+ hours
that's usually what i do at the work place, so i keep the battery topped up, for when i need to jump back in the road
as long as you have WiFi on, or 3G/4G on, or if the CPU is in high activity, you'll never see the charge ever reaching the battery.
i always keep a spare wall charger at the office as well for times when i need a quick charge

Thanks for the input everyone! I'm glad it's not defective cause I love this phone!
Sent from my SGH-T989 using XDA App

My issue is a little different but decided against another thread. My phone will not charge with any other cable. Has to be pluged in to oem cable. I left it all night on my old phones charger and woke up with it almost dead. Plugged into oem it just charges super slow. Should i take it back?
Sent from my SGH-T989 using Tapatalk

Does the other micro USB cable work with other devices? If not, might be a defective cable.
On a side note, who prefers to charge via 500mah vs 1A? I have been charging my phone since day one using my printer, as well as my old Iphone. My battery performance is great! +24 hours on a single charge with moderate browsing 50/50 wifi and 4g. I typically enable the "power save" feature with minimal brightness and 15 sec screen timeout.

I worked on other devices
Sent from my SGH-T989 using Tapatalk

[Q] Charging problem
I have an issue that has popped up today. When charging through PC, the phone (not battery) is getting pretty hot and losing charge. I'm not sure what could be causing it. I stopped all extra processes and turned off the screen. This is not occurring when the phone is off.

[Q] Fast charging

I'm running the Galaxy Nexus with the extended battery. Curious if I could use a more powerful charger to charge faster.
The charger that came with the phone is a 5W (5V, 1000mA). Could I use an iPad 2 charger (10W) to charge up the nexus faster? Any experience with this?

I am pretty sure the phone regulates how fast it can charge. Some chargers that are only recognized as USB will charge slower than a recognized 'phone' charger. I experienced this with my fascinate when using a kindle charger. Using the more powerful iPad charger will almost certainly not charge your phone faster (because the phone probably allows a maximum charging input consistent with the dedicated 5w phone chargers), and may even charge slower as it is recognized as a USB power source and not a dedicated phone charger.

Which battery are u using the 2100 mah?
Sent from my Galaxy Nexus using XDA App

Yeah, I'm using the extended battery (2100 mAh). But the question could be asked of either battery (1850 mAh or 2100 mAh).

tanner.jon said:
Yeah, I'm using the extended battery (2100 mAh). But the question could be asked of either battery (1850 mAh or 2100 mAh).
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Yea of course I was just saying that it doesnt seem worth it to me to get the 2100mah over the 1850 as u really won't be able to tell a huge difference in battery longevity unless u use the 3500 mah which is what I'm waiting for ever so patiently.
Sent from my Galaxy Nexus using XDA App

Is there a way in ICS at the Galaxy Nexus to see if the Phone is in "USB" or "Charger" charging mode?
On my old Nexus One it showed in the preferences in system information which mode it is using for charging.
Or maybe see the actual mA instead of the mode would be ok too.

I don't have the extended battery, but I know if I charge my nexus with my playbook charger,its way faster than the charger that came with the phone... The iPad charger should charge your battery faster without damaging the phone or the battery.
Sent from my Galaxy Nexus

I wouldn't recommend the ipad2 charger.. used my gfs iPad charger the other day when I was in a pinch.. woke up to the phone burning hot..
Also it didn't charge fully after being on it for 7 hours.. go figure
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rudoe said:
Is there a way in ICS at the Galaxy Nexus to see if the Phone is in "USB" or "Charger" charging mode?
On my old Nexus One it showed in the preferences in system information which mode it is using for charging.
Or maybe see the actual mA instead of the mode would be ok too.
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On my stock 4.0.2, Settings->About Phone->Status. Battery Status will show either AC or USB I think in parentheses. My phone is fully charged right now so I can't remember the exact wording.
---------- Post added at 12:30 PM ---------- Previous post was at 12:18 PM ----------
joshnichols189 said:
I wouldn't recommend the ipad2 charger.. used my gfs iPad charger the other day when I was in a pinch.. woke up to the phone burning hot..
Also it didn't charge fully after being on it for 7 hours.. go figure
Sent from my Galaxy Nexus using xda premium
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I use the iGo MicroJuice 2.1A Dual USB Auto Charger in my car with a generic micro USB charging cable. I had problems initially with my N1 using a data USB cable as it always "slow" charged and showed USB charging in the System Settings. With a charge only (data pins shorted I believe) cable, this USB adapter charges both my GN and my N1 as an AC source.
Remember that amperage is equivalent to water flow if analogies help. If the consumer can't or won't draw more current than the source can provide, amperage drops. So, plugging in a fully charged device where the device has shut off the charging circuit, an ammeter will show 0A.
Another consideration is that an AC USB charger is typically plugged into a source of 15-20A. There is no way that it is pulling that kind of current, hence, the connected ammeter would only show the real-time draw. The 2.1A car charger that I have is only the rated potential current. One of these days I'm going to strip down a USB charging cable and connect an ammeter and shoot a video of the phone charging from 0% to 100% displaying the ammeter and an application like Where's My Droid Power.
Sorry for the pontification...

Battery draining while plugged in to charger

I was watching the Mavericks vs Thunder game using the watch ESPN app and my nexus battery was at about 93%
I watch since halftime to the end of the game and I was plugged in to a car charger the whole time and when the game ended about 1 1/2 hrs later the battery had dropped to 53%. Can't understand it. Hope someone here can explain this to me.
Phone is galaxy nexus, obviously, the battery is the 2100 OEM battery from Verizon store, charger is a belkin dual outlet 1amp micro car charger with the cable that came with a Droid charge.
Thanks in advance ladies and gentlemen, I did look and search, didn't fins anything covering this specific issue.
Sent from my Galaxy Nexus using xda premium

i am 99% sure its the car charger. but cant give u a reason

rfvreynoso said:
Phone is galaxy nexus, obviously, the battery is the 2100 OEM battery from Verizon store, charger is a belkin dual outlet 1amp micro car charger with the cable that came with a Droid charge.
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5V right? that's not a huge draw at all on your battery, i'm assuming your car was either running or started right up afterwards...you can be certain your phone was getting that full 1A especially if your car was running. if your phone showed charging and your phone will normally charge from your car like that then you shouldve been in good shape. despite what you may think, i actually am trying to present relevant info lol but ummm other than that? i would definitely try a multimeter (.....if you have one.....) cuz that would show you exactly what you're getting in/out. usb pinouts should be somewhere on the internet. other than that, try doing the same thing (except for maybe a shorter time period if preferred) on a wall charger which should be more reliable and compare results. i've had devices that burn power faster than they receive them....but the good ole gnex? im not so sure. (engineer here).

I just recently join big red and coming from sprint with an evo 4g and didnt have this issue with that phone and same charger. I'm definitely going to try it with home charger to see if its the charger.
Extra info, the vehicle was powered on before I plugged in the charger, in case it matters any.
Thanks to all the reply thus far.
Sent from my Galaxy Nexus using xda premium

I find that under heavy usage, only the plug in wall charger gives enough juice to keep it increasing... and even that can go flat or decrease if you are really pushing it... also the way the battery stats are displayed can be flaky too... jumps in the level of charge and quick drops... hard to tell how accurate the reading is.

I hear you. That's crazy, basically the phone draws more power that the charger can provide. I would think the charger should be fine since its 1 amp just like the home charger.
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Check in settings - status if it says charging (ac) or charging (usb) when plugged in you car.
If it says charging (usb) the charge amps are limited to 500mA.
Sent from my Galaxy Nexus using Tapatalk

The phone can use more power than a car charger can supply. This is commonly posted all over. Check your car charger, its likely a 0.5 amp. Buy a 1 amp or higher.

rfvreynoso said:
Phone is galaxy nexus, obviously, the battery is the 2100 OEM battery from Verizon store, charger is a belkin dual outlet 1amp micro car charger with the cable that came with a Droid charge.
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Your problem is the charger, 1 amp is the sum of the two outlets, hence you're only giving your phone 500mA max. When charging at that low of a rate, you'll drain the battery when doing anything power intensive on the phone. Your only remedies for this is to get a car charger that's capable of putting out 1 amp or more on a single line. What I personally did was get the Griffin Powerjolt dual charger for $8 on Amazon, opened it up, and soldered the center data pins on each port together.

najaboy said:
Your problem is the charger, 1 amp is the sum of the two outlets, hence you're only giving your phone 500mA max. When charging at that low of a rate, you'll drain the battery when doing anything power intensive on the phone. Your only remedies for this is to get a car charger that's capable of putting out 1 amp or more on a single line. What I personally did was get the Griffin Powerjolt dual charger for $8 on Amazon, opened it up, and soldered the center data pins on each port together.
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I though that the griffin powerjolt dual outlet charger would dish out 1amp on a single port if the 2nd port was not being used. Interesting, I can see your point. Would you happen to have a picture of, or remember which are the two that need to be bridge inside to make it a full 1amp output?
Thanks in advance.
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Herman76 said:
Check in settings - status if it says charging (ac) or charging (usb) when plugged in you car.
If it says charging (usb) the charge amps are limited to 500mA.
Sent from my Galaxy Nexus using Tapatalk
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Okay, I tried what you said and I got weird results. I used the awkward griffin powerjolt dual outlet car charger. I tried using two different cables, one was from my girl's Droid charge and when I plugged it in and check the status it said usb charging, then I plugged in a cable that came with a i go green adapter that I had purchased at an airport and the phone said ac charging. Unless the cable that came with the Droid charge can only pass 500mamp, I'm puzzle.
Both were plugged in at same time and also both cables were tried by themselves in each outlet of the griffin charger by themselves.
Interesting huh. I will keep testing and see what gives, last resort I get a more powerful car charger. Will keep you guys posted, thanks to everyone that contributed and pitch in thus far.
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Got an update on this issue. I streamed another 45 mins to 1 hr of ESPN using watch ESPN app and the results are even more interesting. I was using the wall charger that came with the Droid charge and the USB cable that came with the I go green wall adapter that I have purchased at an airport a while back. Here is what happened, when I started streaming the battery was at 94% and I plugged in phone to charger and under settings/about/status it showed AC charging. After 45 mins to 1 hr of streaming the phone was extremely Hot towards the center of the back and below the cam lenses and led light. Also the battery had dropped to 93% and the phone status showed not charging, even though the battery icon on home screen next to clock shows the lightning symbol inside the battery like is charging.
I don't understand what is happening. Grrrrrr. This is using a wall a charger for a droid charge. Now of to trying it with the OEM charger and cable.

rfvreynoso said:
Got an update on this issue. I streamed another 45 mins to 1 hr of ESPN using watch ESPN app and the results are even more interesting. I was using the wall charger that came with the Droid charge and the USB cable that came with the I go green wall adapter that I have purchased at an airport a while back. Here is what happened, when I started streaming the battery was at 94% and I plugged in phone to charger and under settings/about/status it showed AC charging. After 45 mins to 1 hr of streaming the phone was extremely Hot towards the center of the back and below the cam lenses and led light. Also the battery had dropped to 93% and the phone status showed not charging, even though the battery icon on home screen next to clock shows the lightning symbol inside the battery like is charging.
I don't understand what is happening. Grrrrrr. This is using a wall a charger for a droid charge. Now of to trying it with the OEM charger and cable.
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The battery can stop charging if it gets too hot (safety measure).
Sent from my Galaxy Nexus using Tapatalk

Herman76 said:
The battery can stop charging if it gets too hot (safety measure).
Sent from my Galaxy Nexus using Tapatalk
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Exactly, in the driver i think the overheat is set to 140F. Also when your charger showed as usb it only gets 509mA and when showing ac it gets the full 1 amp. So just pay attention next time and see if it drains when showing ac.
My car charger is a 1.3 amp and always shows as ac and never drains while charging.

Herman76 said:
The battery can stop charging if it gets too hot (safety measure).
Sent from my Galaxy Nexus using Tapatalk
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I though about that but then I was wondering, shouldn't the wall charger provide enough power to run everything in there while charging the battery or even without the battery in the phone. Like shouldn't the battery hold the charge that it already has when I started streaming as long as the charger is 1amp?
I would not care if when I stream the phone battery would just hold its charge at what it has at the moment even if it does not charge while streaming. Hopefully that is clear to understand.
To all the fellow galaxy nexus owners out there, maybe you all can test on your phones and see if you get same results as me. Download watch espn and stream the channel for 30 mins, notice what is your battery level before you start streaming, of course plug the phone to a car charger or wall charger and see if battery remains the same, drops charge, or gain charge at the end of 30 mins, or maybe an hour. I am not asking you to watch it for the 30 mins or 1 hour, just let it run and see what happen, if you can of course. only reason why I ask for watch espn is because it is the app that I have been using to stream nba games for the last few days.
Another thing since I am already here with this streaming issue, I have an original SlingBox, the cheapest of the cheapest when they first came out, just coax and that is it. I would like to know if I pay the $29.99 for the app from the market when i switch roms on my galaxy nexus would I lose the app? I have already unlocked and rooted my galaxy nexus and lets say I buy the app and I am running cm9 when I purchase it, if I change to gummy rom or back to a stock rom while still rooted would I have to re-buy the app ?
Thanks in advance for all the input.

Have u tried underclocking cpu with setcpu app?
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King Jeriamas said:
Have u tried underclocking cpu with setcpu app?
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No I haven't try that. I am currently testing out roms like a mad man trying to find the best for my liking. Question for ya, As far as I know that is kernel dependent right? Like the kernel has to support it, if so which kernels do support it and what would be good underclocking settings ?

I get similar results while using navigation and pandora at the same time, the phone uses more juice than the car charger can provide.

Ironically I plugged in the oem charger and oem cable from the galaxy nexus box and open it (didn't really wanyed to do that) and streamed 30 mins of espn on watch espn and battery was at 70% when I started after 30 mins streaming it had actually climb to 78%. Confused yet everyone? What gives?
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Not all that odd. Using my Fascinate charger (0.7 amp) I get noticeably slower charge times than the OEM charger (1 amp). I don't use my phone much while I'm charging so I can't provide any feedback for that.
What is the Droid Charge charger rated at?

HSPA is draining my Gnex battery faster than my macbook air can charge it!!

Just got my Galaxy Nexus and everything is rosey and wonderful (simply using stock jelly bean for now), until suddenly i see that I can't even use 3g internet for long periods - *even with it being charged by my macbook air*!!.......
Do some kind fellow XDAers have any suggestions for how I can improve the situation?
Are there some cables that are better than others for charging - maybe a shorter one rather than longer, one with extra pins in it or something, specific brand? Is it that the macbook air isn't high wattage enough of a computer to reliably supply a battery-sucking HSPA chip in the nexus???
My MBA itself was ALSO plugged in at the power and it was in full power mode afaik. also it's windows bootcamp on the mba, don't know if that makes a difference.
Anyway Is there a specific USB charger that would be recommended? some high grade one to guarantee best charging power?
But I can't always be at a wall charger when doing a bit hspa session on my phone. it might be the train. and the laptop is the only power source with which to keep the juice up. (well try anyway :/)
I'll be upgrading to the retina macbook pro anyway soon, maybe that will improve things?
is there some windows app that allows you to regulate usb port power and keep it at a constant high level? (if this is even scientifically correct the way I'm describing things).....
Thanks

USB charging is fairly weak and slow. Some custom Roms have a fast charge option, not sure how much it would help though. You'll have to let someone else chime in who has more knowledge on the fast charge option.
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I don't think there is enough power from the air to power your phone enough. You could try installing a kernel with fast USB charging like trinity.
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Get a 1amp AC charger
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Its likely that the ports on you air aren't able to put out enough power to actually charge the phone. I have an air as well and my phone charges VERY slowly when connected to it.
I would recommend buying a longer usb to micro usb cable.
I got a 6ft one from www.monoprice.com. Good price and solid quality.

AlexWekell said:
Get a 1amp AC charger
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Won't do any good if he needs the air to charge in certain situations. I agree that the MacBook just isn't able to push enough to keep up.
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fast charge option with kernel is best idea as mentioned above

Try to use AC Charger instead of USB. That's the root cause. The maximum power of USB is only 500mA, but the minimum of AC Charger is 1000mA.
BTW, that's not the HSPA's fault. When I play games on GNex which means the screen keep on, the USB charging can't catch up with it. You can see the lossing of power, 5%, 4%, 3%, 2%, 1% and .....

I have this problem also. USB charging takes a hell lot of time and hence I use the wall charger to charge it
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USB 2.0 puts out a maximum of 500mA, with line loss etc it'll be more like 400. That's barely enough to charge the phone if you're using it. Charge it off the wall with a 1A or 2A charger.
That being said, my late 2008 MacBook Pro 13" charges my GNex just fine off of USB.
The latest model MacBook Airs and Pros will help a little because they have USB 3.0, which charges at 750mA (or thereabouts). Still, if you want a fast charge just use the included 1A charger or buy a 2A charger online.

This is normal, USB only charges at 500 mA, ac charges at 1000 mA. so its possible to pull more than it can charge. Use a kernel and enable USB fast charge and it will use ac mode on USB, but only if your USB connection can output higher than 500. So be careful.

Is this normal???

I've just had a pretty long drive to take my son to the zoo.
I usually don't charge my phone in the car but because I only had 50% battery left I plugged in the car charger while I used Google navigation...
I had the charger plugged in the entire way and when I got there the battery had dropped by around 15%, so basically the navigation was killing the battery quicker than the car charger could charge it up.
Is that normal??? My screen brightness was on around 60%
Thanks for replies
Sent from my Galaxy Nexus using xda app-developers app

zolah said:
I've just had a pretty long drive to take my son to the zoo.
I usually don't charge my phone in the car but because I only had 50% battery left I plugged in the car charger while I used Google navigation...
I had the charger plugged in the entire way and when I got there the battery had dropped by around 15%, so basically the navigation was killing the battery quicker than the car charger could charge it up.
Is that normal??? My screen brightness was on around 60%
Thanks for replies
Sent from my Galaxy Nexus using xda app-developers app
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Well, yes its normal because most likely your car charger is a USB car charger, which charges slower than an AC charger. If you had a custom kernel, and had fast USB charge, then this wouldn't be a problem because it would charge fast enough.
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I've had battery drop while charging with navigation before, not nearly that bad though.
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EpiclyEpic said:
Well, yes its normal because most likely your car charger is a USB car charger, which charges slower than an AC charger. If you had a custom kernel, and had fast USB charge, then this wouldn't be a problem because it would charge fast enough.
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Sorry to sound dumb but i dont quite know what you mean there.
Its a straight charger from the ciggerette lighter to the micro USB port. It doesnt convert from the cig charger to a usb/micro usb cable

zolah said:
Sorry to sound dumb but i dont quite know what you mean there.
Its a straight charger from the ciggerette lighter to the micro USB port. It doesnt convert from the cig charger to a usb/micro usb cable
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Well, it means its charging with USB power (Which is about 500 mah.) and sometimes it can't keep up with the phone using power and charging it at the same time. However, if you get a custom kernel with a "Fast USB Charging" option you can make it charge just as fast as an AC wall charger. Therefore, solving your problem with the dropping battery while charging.
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