For questions related to batteries on Android devices. Questions about battery life should be tagged with [battery-life]

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1answer
119 views

KitKat issue: device turns on when plugged in

Yesterday I updated my Samsung S4 to 4.4.2 (I9500UBUFNA2 - Kernel 3.4.5-742022 18-Feb-2014) via Kies 3. If device is turned off then I plug in, picture of measuring battery image appears for 2 seconds ...
3
votes
1answer
166 views

Does syncing more Google accounts decrease a phone's battery life?

I recently got a Motorola Moto G (4.3 upgraded to 4.4.2), and I wasn't getting the battery life that my vendor claimed I would get (Through mixed usage: 2-3 hours of music, some web browsing, a lot of ...
1
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3answers
670 views

Nexus 5 whole battery drained in a single night

I charged my phone to 100% before going to sleep. I used it for only few minutes and found out my phone was off in the morning because all the battery was drained. I charged it and saw battery stat ...
2
votes
2answers
124 views

Does 'Easy Battery Saver' work?

I ran some tests in my Moto G and it was quite disappointing. The first hour was dedicated to measure the performance in 'Intelligent Power Saving Mode', followed by an hour of the app uninstalled. ...
2
votes
1answer
150 views

Possible to charge one phone off another?

What's stopping the ability of charging a cell phone from another cell phone? If I were to create a crossover/patch USB cable and connect it between two phones or tablets, would there by any way to ...
0
votes
3answers
117 views

15 Min my battery goes to 97% to 17%

Yesterday I was watching a video on my andorid GTP3-100, and my batter was at 97% after 15 min I looked at my battery it had gone to 17%, and it was draining battery fast and after 5 min its went to ...
1
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0answers
113 views

Does GPS cause the phone to get hot?

I am using a Moto G device and I have noticed that when I turn on applications that rely on the GPS Waze or Mapquest, the device gets hot. As in hot to touch. I was previously using a Samsung Galaxy ...
0
votes
2answers
167 views

Moto X Battery Question

I'm new to android and the Moto X. (iPhone 4s previously. don't judge.) I purchased my Moto X a couple days ago (2/15/14) and overall I'm very happy. The battery life has me concerned though. ...
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0answers
42 views

30% cpu usage when charger unpluged. When pluged in, cpu usage drops to 2%

I have checked by external debugger and it seems that "batteryservice:update start" runs 10 times per second. Other battery processes are running very often too, only with charger unpluged. It's brand ...
0
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0answers
82 views

Hardware problem: extreme battery drain

I've been experiencing extreme battery drain on my Nexus 4. Basically the phone drains 10% per hour on idle. I flashed the official Android 4.2.2 image and did a reset. I replaced the battery with a ...
0
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0answers
350 views

MpDecision - cpu power consumption

I have a customize rom. With battery drain, about 3 times vannila/stock rom. with gapps, wifi off. proc/uptime show same wake time as stock/vannila for the same scenario possibilities of battery ...
0
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0answers
60 views

Severe battery drain by androidOS over multiple ROMs

I'm using xperia Sola. For the last 15 days i noticed that my battery was draining abnormally fast. When i view battery stats in settings the androidOS is always at the top with more than 90% battery ...
1
vote
1answer
128 views

Unwanted processes

I bought a Sony Xperia SP phone 3 days ago. Nice, fast, everything is seems to be all right, except for 2 things: Last night, I killed all the tasks, set the stamina mode, and charged it to 100%. I ...
3
votes
1answer
172 views

Don't charge to 100% when always-on wall-plugged-in

I want to use a Google Nexus phone for an always-on wall-plugged-in WiFi tethering access station. It occurred to me that if I just do it like this, then I'm risking ruining the battery within a ...
1
vote
5answers
2k views

Slow Charging Battery!

I have a Samsung galaxyS3 the battery has been charging really slow. It can take up yo 10 hours to charge 100%. I have tried every thing I can think of. I've tried a new charger, new battery, shut ...
2
votes
0answers
159 views

500 charge limit on wireless charger for Nexus 4 / 5 (QI)

I recently bought a QI compatible charger for my Nexus 5. On the box it states, that the wireless charges up to 500 times. I don't understand why the charger is only able to charge my phone 500 times. ...
3
votes
2answers
4k views

how does battery calibration work?

There are several posts on how to calibrate android batteries but none describe its working. How is it that the system can determine at what voltage the battery is considered to be charged (100% or ...
1
vote
1answer
620 views

First battery charge on new tablet?

I got yesterday a Galaxy Tab 3 and I want to be sure what's the best way for the first battery charge. On the shop, they told just turn it on, wait for the battery to finish and then charge it to 100% ...
0
votes
1answer
110 views

Is there anything similar to APNS on Android?

Is there anything similar to APNS (Apple Push Notification Service) on Android? (APNS uses a single TCP connection between an iOS device and an Apple-controlled server, which issues push ...
0
votes
0answers
37 views

How do I know which apps are actually using battery?

There is a Battery section within Settings on my Galaxy Nexus, which shows which apps are using the most battery. However, it would appear that not all apps are present. For example, my mail client ...
0
votes
1answer
32 views

What are the hardware requirements for Battery monitoring?

I looked at the hardware compatibility list, but there is no mention for a requirement of a battery monitoring functionality in the hardware. But, all phones display the battery level with the ...
0
votes
0answers
374 views

Battery and recharging suggested practices on Galaxy Note 3

Can someone please verify that the note 3 uses a Lithium Ion Battery? Does using the Note3 - for example making a call - while charging negatively impact it? My old flip-phone would heat up if I ...
0
votes
0answers
48 views

How are Battery History logs generated

How are the Battery History logs generated in dumpstate? I know that battery history is printed in dumpstate by batterystats.java, but how does this file get the battery stats from kernel? Also, how ...
0
votes
1answer
116 views

How can I increase my samsung galaxy fit's battery life?

I'm using Samsung Galaxy Fit(S5670) and running official 2.3.6 version. My battery's capacity is 1350mAh. Can I increase this capacity to 1500mAh or 2000mAh?
1
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0answers
33 views

Phone turns off at random

I have a note 1 N7000, and each time the screen began flickering and after that it shut down. This got worse after flashing a cyanogenmod rom. By plugging in the charger the battery seemed empty, but ...
1
vote
1answer
75 views

Make the sleep timer on a tablet dependent on whether it's being charged or not

Is there a way to set the sleep mode timer depending on whether the tablet is being charged or not? I normally have my Android tablet (Xoro Pad 9718, Android version 4.1.1) next to my computer on ...
14
votes
1answer
250 views

How do I fully charge my emulator battery?

It bothers me to see half charged battery. Anyone knows how I can fully charge it?
0
votes
1answer
141 views

Differences in battery information and phones printed labels

I just run across this today: The value for battery current capacity printed on the battery of some Samsung Android devices are different than the numbers printed on the label on the phone (underneath ...
0
votes
1answer
434 views

Is there a TRUE brightness controlling app?

I need to set my brightness below what Android allows me, and thus I'm testing a bunch of "dimming" apps. What they all have in common though is that they put on a filter over other apps so while they ...
1
vote
1answer
260 views

How to solve the short battery life with galaxy s4?

I bought Galaxy S4 in just half year. However I found some wrong with the bettery, my phone shutdown automatically recently with over 20% battery. I can only use the phone for two hours after my phone ...
0
votes
1answer
112 views

Nexus S battery drains after updating to 4.2.2 even if turned off

My Google Nexus S battery drains after updating from 2.3.7 to 4.2.2, even if it is turned off. One night I shut it off at 70% charge, and when I turned it on in the morning it was at 9 or 10%. I ...
1
vote
0answers
172 views

Samsung Galaxy Note 2 wont charge while on and battery is discharging

So after reformatting my phone, resetting to defaults, nothing has seem to work. I even took it to my cell provider to see the tech, they didn't do anything. Whats weird is that it had 20% and so i ...
0
votes
1answer
56 views

Any way to reduce the frequency of searching for a signal

My fiancee just got my old SGS2 when I got my new N5. The problem that she's having is that there is no cell reception at her work. And because of this, her phone is constantly searching for a ...
0
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0answers
2k views

Battery Trickle Charging, good or bad?

What are the side effects of using apps that trickle charge battery. App like "Battery Doctor". It charges around 30-50 (varies with device) mins after battery is fully charged, which results in a bit ...
0
votes
0answers
47 views

How do I decide what car charger I need to buy?

I am with Nexus 5 and finding it difficult to decide on what car charger or car dock with charger I need to buy. As there is no accessories from parent company (LG or Google) I not sure what charger ...
0
votes
0answers
80 views

How to disable/remove ALL cell functionality

I have a Kyocera Event (Virgin Mobile) running stock Android 4.0.4. This is only used as a media player for about 90 minutes ONE DAY per week. I am looking for a good way to extend battery life as ...
1
vote
2answers
1k views

Device Steadily Discharging While Plugged Into AC?

Question: My device (Galaxy Note 2 running the stable CyanogenMod release) is charging extremely slowly and discharges while it's plugged into AC power. What happened to cause this and what's ...
0
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0answers
128 views

USB connection issues with Nexus 4

I've installed some app from Google Play called "franco.Kernel updater", which had an option to enable "fast charging" (the app claims it provides a custom kernel that saves battery life). After I ...
0
votes
1answer
209 views

will gaming destroy my phone battery?

I think games probably destroyed my Note 2 battery. I often play games for hours straight while charging. Last Sunday it was dead with horrible heat. Then I borrowed friend's mpj backup battery, ...
0
votes
0answers
293 views

How do I stop “USB debugging” mode auto-enabling and default to just charging in android 4.2.2?

I have an HTC one, running Android 4.2.2 overlaid with HTC Sense 5. I am trying to plug it into my car stereo. All I want to do is play audio from spotify via my car stereo (which wasn't a problem ...
1
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0answers
31 views

Samsung tab charging

Tab gt7500 battery went flat while downloading and now does not want to charge with supplied charger or via computer
1
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0answers
126 views

Strange Behaviour of HTC One X battery

maybe someone recognizes my problem or has had it himself. My problem is as follows: Normally I turn my phone of over night. Battery Monday evening 50%, Tuesday morning 23% Battery Tuesday evening ...
0
votes
1answer
148 views

Nexus 7 refuses to boot unless plugged into outlet

I've looked around the internet for this problem ad/or solution for hours and have found absolutely nothing on this problem. My tablet is brand new, straight from the box. When i have it plugged in ...
1
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0answers
65 views

Android battery mucking up

I have an unusual problem with my galaxy s4 battery. Screenshot (click for larger variant) Sometimes when the battery level is 85% it can shut off and when I turn it back on it can go straight to ...
1
vote
0answers
48 views

Why battery “sags” on my device and how to fix/workaround it?

Sometimes my device shows "No SIM card" status and "0%" battery and soon powers off (even if I manage to quicky connect it to USB). After powering back on it works more or less as expected. Why ...
0
votes
1answer
70 views

Why the battery attributes are missing in android phones?

on the android shell, when I executed following >ls /sys/class/power_supply/battery was expecting, current_now, power_now, charge_now or energy_now but I didn't find any *_now attribute other ...
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votes
1answer
100 views

Android software runs differently based on different battery chargers?

I have a Samsung Galaxy Nexus and a Samsung Galaxy Mini2. In mid-August I lost my GNex battery charger; then I started charging the GNex with the Mini2 battery charger. Their specifications are: ...
1
vote
1answer
173 views

Is there any battery-less Android-based device

I'be been working on some Chinese (bit crappy) device, with own system, that had one wonderful (at least for me) feature. When constantly powered-up (plugged to power adapter) it could work without ...
1
vote
3answers
363 views

What happens when using a cellphone when charging?

What happens when a phone is being used with the charger connected? Will it take power from charger and save the battery usage? OR At one end, the charger keeps charging the battery and at the ...
0
votes
1answer
124 views

S3 battery not work after water damage [closed]

I dropped my S3 in water and the stock battery stopped working. I didn't know how to fix it (I tried drying it with a hair dryer but it did not work) so after comparing prices and discounts I bought a ...