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

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2
votes
1answer
726 views

What is the difference between “Screen On” and “Awake”?

I can possibly understand why the phone can be Awake without having the screen on (background stuff), but how can the screen be on without it being awake? If relevant my device is the Nexus 4 ...
1
vote
1answer
52 views

Closely monitoring charging (with bike charger)

I bought a bike charger for my Sony Ericsson Xperia Mini Pro sk17i . When I cycle, the phone says that it is being charged, but apparently it is not because the battery percentage doesn't increase. ...
0
votes
1answer
36 views

Apps uninstalling on battery death

I have an HTC Incredible smartphone. Every time the battery dies during normal usage, my applications uninstall. Why does this happen, and how can I prevent it from happening in the future?
1
vote
0answers
98 views

Exotic case of Galaxy Nexus not booting

Symptoms : Put battery into Galaxy Nexus (tried with two different including a brand new one) Plug cord to USB host or charger Large battery charge indicator icon appears in the middle of the screen ...
1
vote
3answers
82 views

Upload battery status to a website

I would like to maintain a central list of the battery status of my devices. For my Linux laptops, I will write a small shell script that reads the battery information from the kernel and uploads it ...
1
vote
2answers
72 views

Are there any issues in storing an Android battery?

I want to buy a 2nd battery for my i9100 because the phone is getting old and I don't know if parts will be easily available a couple of years on (don't want to upgrade, I like it too much), but I've ...
3
votes
0answers
352 views

Android stuck in downloading mode

So what happened is that my mobile (Galaxy S4 - GT-9500) ran out of charge. When I plugged in the charger and tried to turn it on, it went directly to what I think is the recovery mode (Android logo ...
2
votes
0answers
35 views

Battery percentage going down while charging! [duplicate]

(device: Samsung Galaxy S 3) I've just witnessed something rather strange: while tethering to my laptop, with the phone being plugged in a power source (the charger I got with the device) - the ...
1
vote
2answers
2k views

Samsung Galaxy Nexus doesn't detect charger

This happened yesterday night first. My phone's battery was very slow, so I decided to charge it. It didn't start charging after plugging in the charger. Frustrated, I kept trying with different USB ...
1
vote
1answer
155 views

Android power Usage - How to monitor

TL;DR: Is there some reasonably time-efficient way to find out what programs cause Android OS Services to drain battery? On a regular basis I find that some app causes my phone to run hot and drain ...
1
vote
1answer
44 views

how long can the battery in my new mobile stay idle till first use

I bought a Samsung Galaxy 6 months ago. Have not used it yet nor have charged the battery atleast once. I am worried about the battery. Can i keep it idle two more months.
28
votes
5answers
11k views

Why are some USB chargers slower than others?

It seems with USB chargers for my android phone, not all are created equal. The first pic is the official charger which came with my phone (galaxy nexus). It charges quickly, from 0 to 100% in a ...
1
vote
2answers
4k views

Turn off cell standby?

I have a Droid Charge, but I live overseas and it's not an international phone so I can only use it for wifi. It is constantly searching for a signal that doesn't exist and it's eating my battery up! ...
4
votes
1answer
4k views

How does the Android estimate the battery level without a current sensor?

The BatteryManager class doesn't have the metric for current: http://developer.android.com/reference/android/os/BatteryManager.html And then I have found this post: ...
3
votes
1answer
2k views

How does the Android OS estimate remaining battery time?

Is it known how the Android OS estimates time to failure / remaining battery charge? I am doing a school project about battery estimation on mobile devices but have not been able to find any ...
0
votes
3answers
202 views

Wifi battery saving tips or automation

A person that is not expert in computers & technology (including smartphones) bought a Galaxy Mini S3 and asked me some help. He is very old of age. The problem with this phone is that Wifi ...
1
vote
0answers
442 views

Mediaserver is eating my phone's battery?

I'm using dual boot on my SGS2 with CM10.1 and JellyBam and both running fine but with some issue of mediaserver draining my phone's battery like a crazy nut. I have checked on Google and got many ...
-2
votes
1answer
23k views

Unusual battery drain on note II [closed]

My Note 2 battery is driving me insane. I have been using my Note 2 for like 2 months. And I had been following the recharging cycle where you only charge the battery when it reaches 5% or less and ...
3
votes
2answers
1k views

galaxy s3 not charging

I have a samsung galaxy s3. It is only 7 months old. Its battery is not getting charged. I have tried to reboot and take the battery out and put it again,it still doesnt get charged. The usb port is ...
2
votes
1answer
1k views

Why is my battery low only a few hours after charging?

Twice recently I have charged my Samsung Galaxy Ace at night and when the phone indicates it's fully charged I unplug the charger only to be woken a couple of hours later thinking I have a text come ...
3
votes
2answers
6k views

Why doesn't my phone charge?

Okay, so I already ordered a new battery, but in the mean time. Why won't my phone charge? I have tried every charger/cable in my house and car (over 10 chargers and around 15 cables). Double ...
1
vote
0answers
4k views

Custom ROM to improve Galaxy I9000 battery life (if mostly standy)? [closed]

I have a Galaxy S I9000 (2.3.6, Gingerbread.XXJW4) and use my phone minimally (mostly just on standby). I would like a least a couple of days, and hopefully a week or two between recharges if possible ...
0
votes
0answers
673 views

Why will my Samsung Galaxy Gio not turn on

My Samsung Galaxy Gio hasn't been working properly for a few days, and now it won't even turn on. I can get it to the recovery page, but it will not do anything after that. I was thinking that it ...
0
votes
1answer
369 views

HTC One S won't boot after battery fully drained

Today the battery of my HTC One S got completely empty and when trying to reboot it's just stuck on the splash screen. I am rooted and have Trickdroid 8.1 installed. This is an 4.0.4 ICS ROM. I've ...
7
votes
1answer
3k views

How to allow auto-update of apps in Play Store only when plugged in?

I would like apps to be updated automatically when my phone is plugged in (charging) and on wifi. I can easily allow auto-update only when wifi is on with the appropriate option in the Play Store ...
0
votes
0answers
1k views

Charging paused, battery temperature too low

I dropped my Samsung Galaxy S2 in water, and now when I plug it in I get a message that says: Charging paused, battery temperature too low Is there any way to fix this?
3
votes
4answers
1k views

my samsung galaxy 2 battery is draining to fast!

I have an Samsung Galaxy S2 GT i9100. I have had it for quite a time, but today I noticed something strange: First my battery had not been charging while I was sleeping: when I woke up I had only ...
1
vote
1answer
793 views

Battery getting charged with ultra speed and continuous at 1%charge for more than 9 hrs

My neo v battery getting charged with in ten min from 0 to 100 percentage( Exponential growth graph ) with ultra speed and getting discharged to 1%( it also give alert showing last 1% left, keep ...
3
votes
0answers
531 views

Nexus7 Stuck in Reboot Following Full Discharge

I am experiencing the same symptoms as described in the following: " Nexus 7 is stuck in reboot loop after full discharge " My Nexus 7 is full discharged. I have it connected to Factory AC-to-USB ...
2
votes
0answers
187 views

time_in_state wrong value

I've been using apps like "BetterBatteryStats" and "CPUSpy" to see what CPU states my phone is most frequently in, but both are reporting the wrong clock frequency. I can only assume they are using ...
1
vote
2answers
439 views

How to prevent Nexus 7 of charging the battery every time when connected to a USB?

Hello fellow Android enthusasts, I recently bought a Nexus7 that I want to use for development. The thing is, every time I connect it to my USB, in order to test some apps on it, it starts charging. ...
6
votes
5answers
39k views

Serious battery drain (Screen, Android OS) after JB upgrade

Since I upgraded my Samsung Galaxy SII from Android 4.0.4 (ICS) to 4.1.2 (JB), my battery life has decreased dramtically. Running ICS I could easily have ~25% battery left when going to bed, after ...
0
votes
0answers
308 views

Does the Nexus 4 battery drain faster if it has no SIM card inserted?

Does the Nexus 4 battery drain faster if it has no SIM card inserted?
5
votes
1answer
10k views

Is there an efficient way to calibrate the battery than using some apps?

Is there an efficient way to calibrate the battery of my tablet in order to prove or disprove the very low battery backup than using some Apps.? The context is that my tablet is giving a very low ...
4
votes
1answer
13k views

Google Services battery usage

I recently updated to the 10.1 M snapshot of CyanogenMod for my Sprint Galaxy S3 (d2spr). Ever since I did the update, I have been seeing crazy high battery usage from Google Services. I have tried ...
1
vote
0answers
206 views

Phone interrupted during first charge, battery damage?

Got my new Sony Xperia Go and after draining its initial power, plugged it in to charge. Red light was on, but the battery icon did not show that it was busy charging. So I unplugged it and ...
3
votes
0answers
287 views

Verizon Galaxy Nexus Discharging When Plugged In Even After USB Replacement

I've got a Verizon Samsung Galaxy Nexus that as of a few weeks ago quit charging - in fact it quickly drains the battery (discharges 2% / minute if not more) while plugged in. I tried different ...
3
votes
3answers
3k views

Nexus 10 Instantly Lost Battery Charge

I had my tablet at around 90% charge with nothing running on it and went to bed. I wake up in the morning to find it will not turn on. When I plugged it in the battery icon would appear showing it was ...
-1
votes
0answers
379 views

What happens when the Home button on Android phone is pressed? [duplicate]

Possible Duplicate: What happens to a running program when “home” button is pressed in Android phone? My friend raised a concern that pressing the home button is not advisable and it drains ...
2
votes
3answers
11k views

Will playing a game in a Android phone while charging damage or cause harm to the battery or the phone?

Will the following situation damage or cause any harm to the battery or/and the phone: The phone is being charging (regardless it is using the electrical outlet or via USB) and .. You are playing a ...
2
votes
0answers
734 views

How to properly charge a Lithium Polymer battery [closed]

My battery is Lithium Polymer. I want to ask the following: Is a Li-Po battery essentially the same as a Li-Ion battery? Can I use my phone while it's charging? I've read that you have to calibrate ...
1
vote
3answers
1k views

Does USB tethering degrade droid batteries?

I want to know if tethering with my Xperia Neo V via USB will affect the battery capacity in any negative manner other than the usual.
0
votes
1answer
2k views

Why the battery need to be loaded before to root?

I read in some tutoriel that for the root to be working, battery needed to be loaded around 70 at at least. Why is it so? Does it endanger the phone, or it just prevent the root to be working for ...
2
votes
2answers
10k views

Can you actually determine the mAh of a battery?

You can skip the story part but for better reference, please read it: A Little Story My phone claims it has a battery of 4000 mAh that lasts for 3 days. I got the phone, really psyched because of ...
0
votes
2answers
322 views

Saving battery life: pressing home button or back button

My friend said when using an app, pressing the home button saves battery life instead of pressing the back button. He thought by pressing the home button, the app stays in RAM so that when you reopen ...
0
votes
0answers
243 views

samsung galaxy s2 battery shuts phone down when plugging in charger

I have a Galaxy S2 and when I plug in the charger on one battery the phone shuts down and will not reboot. On battery #2 (exactly the same OEM) the phone remains usable on the charger. Dilemma that I ...
6
votes
1answer
183 views

How can I see what kind of car charger I have?

I noticed that when using navigation plus GPS my phone (Galaxy S2) still discharges a bit even so its connected to a car charger. While googeling, I found out that regular USB chargers only charge ...
11
votes
1answer
12k views

Nexus 7 wont boot after complete discharge

I accidentally let the battery on my Nexus 7 run completely empty, and now it won't start up anymore even after charging overnight. How can I make it work again? This is what happened in detail: My ...
13
votes
5answers
16k views

Mediaserver using excessive CPU time and battery

I've got a Nexus 4 on OS version 4.2.1 that suddenly started to drain it's battery very quickly. When looking in the battery usage I see "Mediaserver"eating 60% of the battery over time, with several ...
4
votes
1answer
539 views

How to find pid of Battery Service?

I am able to find the pid of System server using ps. And I can find info about the system server process through /proc/pidof system_server. But I dont see (or unable to find) the pid of the other ...