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

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186
votes
6answers
39k views

Does constant charging harm my Android cellphone?

I usually disconnect my cellphone from the charger some time after it's fully charged because I'm afraid the battery could lose capacity over time if I don't. However, I believe modern electronics ...
6
votes
4answers
4k views

Is my phone liable to explode if I charge it with a charger that came with a different phone?

My friend and I both have droids and we often user each other's wall chargers out of convenience. I was told that it's possible that my phone might explode if it's charged with a charger that wasn't ...
24
votes
3answers
24k views

Do I have to charge my phone before I use it the first time?

When I got my last phone, a SE k850i, I was recommended to charge it fully once before I even turned it on. Does this apply today as well, for my coming HTC Desire HD? Why was I recommended to do so ...
10
votes
3answers
7k views

How frequently is it okay to let the battery discharge fully or as low as possible?

I know that atleast once or twice a month a full battery drain and then a 100% charge helps increase the battery life and also gives more accurate battery readings. I was wondering, how frequently is ...
14
votes
2answers
3k views

When should I start charging my Lithium battery?

The comments in this question say that I shouldn't wait until low battery charge level before I charge, because that reduces battery life (this is contrary to my understanding before that the faster ...
19
votes
4answers
3k views

What causes battery to drain faster than it can charge?

I have a Moto DROID (v1). On a trip from Tyler, TX to DFW airport I had my phone in the car dock and charging. I was using Navigation for directions to the airport and also had Listen running to ...
4
votes
2answers
2k views

How can I tell what is really draining my battery?

I know that by going to Settings > About Phone > Battery Use, I can get some idea of the applications that are using up the most of my battery. I see things like "Cell standby", "Phone idle", ...
60
votes
11answers
70k views

How to disable battery full notification sound?

When battery has been charged full, my Galaxy S phone gives the same notification sound that is used when I receive SMS. Is there a way to disable the sound without also disabling sound from SMS? It ...
26
votes
8answers
30k views

Why is charging from computer using USB slower than using an outlet?

And what is roughly the ratio of the charging speed in USB vs charger? My phone is Samsung Galaxy S, if that matters.
18
votes
4answers
13k views

How can I avoid the battery charging when connected via USB?

I'm using my Samsung Galaxy S2 for development so I regularly plug it while it's not fully charged, and my phone starts charging over USB. I think this (charging while in use) can affect battery life ...
14
votes
3answers
47k views

How can I find out what causes “Android OS” to consume battery?

The issue is that I see a high percentage on the "Android OS" item in the Battery Usage, and I want to find out what is causing it. But let me say that I'm interested in diagnostics techniques and ...
5
votes
1answer
11k 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 ...
0
votes
1answer
236 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 ...
10
votes
6answers
34k views

What can cause “Android OS” process to use high percentage of battery?

I've read a bunch of forum posts about the Android OS battery drain bug. This is where the 'Android OS' process is showing large percentages in the battery statistics. For me, I'm running 2.3 ...
5
votes
3answers
5k views

How to break in a new cell phone battery?

Whats the best way to break in a new cell phone battery? I just got a replacement battery for my Motorola Droid and so far through 2 cycles it is barely lasting a few hours.
8
votes
5answers
4k views

Is there a quick-fix for the Galaxy Nexus when it signals “charging” without beeing connected via USB?

My Galaxy Nexus goes into charging mode but when it isn't plugged in. The battery symbol then indicates a charging and when in suspend mode, the display turns on which drains battery rapidly. I am ...
14
votes
3answers
25k views

How do I turn off the cellular radio without disabling bluetooth?

I have an old Motorola Droid that is no longer subscribed on any Verizon service. I still use it for things like web browsing, ebooks, and along with some wireless stereo headphones, music. I've ...
13
votes
3answers
15k views

How to know app name by UID

I have found that UID=10058 using battery much in "battery history" How can I know app name by UID=10058
11
votes
5answers
602 views

Wearing down battery as fast as possible

I am trying an experiment and I need to wear down my Droid Incredible's battery as fast as possible. What apps are known battery hogs? I've already beaten Angry Birds so that one is off the list for ...
7
votes
2answers
929 views

Why does my Nexus One power off with 15% power remaining?

Once my Nexus One's remaining power drops to 15%, it automatically powers off. On turning it back on again, it reports that it's now on 0% power. Do all Nexus Ones behave like this, or is it just ...
6
votes
1answer
1k views

Is there anything that can show exactly what has awaken my phone?

Recently I had some issues with my phones battery getting drained in 8-10 hours, even though the screen was active for less than 1 hour and wifi/bluetooth/gps was off. My first thought was to check ...
14
votes
4answers
6k views

Cut power to a phone without a removable battery?

Well just as the title says, if you have a phone without a removable battery (HTC One X) and it freezes while modding it, how do you cut the power if you can't pop out the battery? I could see non ...
4
votes
1answer
807 views

Is recalibrating the battery after flashing a new ROM really neccessary, and if yes, why?

The description of the app, Battery Calibration, claims that after changing ROMs you should recalibrate your battery gauge. It has good reviews so it seems like the general concept is sound and trying ...
3
votes
1answer
4k views

Looking for a consistent answer about battery calibration

This forum is full of questions about battery calibration. The thing is, that either I'm blind or one answers contradicts others. In particular: For example forums says, that battery should be ...
3
votes
0answers
390 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 ...
1
vote
2answers
187 views

Resettng an android device with non-removable battery

I'm planning to buy my first android phone which has non-removable battery. But in case the phone hangs what to do ? As in general case we remove the battery from the device and plug it in after a few ...
1
vote
1answer
336 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 ...
15
votes
1answer
4k views

Charging over USB can be harmful?

Considering that charging over USB can take around 5 hours (to only 1-2 hours it would take from the wall mounted plug), can it be harmful for the smartphone battery if it's always charged from USB?
10
votes
1answer
815 views

What does “Battery Use” tell and how is it implemented?

I have several questions about "Settings -> About Phone -> Battery Use", mainly because I don't understand what exactly those items mean. (1) Does "Cell standby" indicate the energy used by the radio ...
7
votes
2answers
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 ...
5
votes
7answers
2k views

Battery drains even when plugged in while using Nav app on long road trips

I have a Nexus S running Android 4.0.3 and Google Maps 6.8.1. When I use the Google Maps navigation app, the battery slowly drains, even when plugged into my car charger. After 5-6 hours, the phone ...
3
votes
2answers
8k views

Why is Google Maps always running in the background?

I'm running on JB. The Google Maps application always seems to have 2 instances running in the background inspite of turning the GPS off. Is there a clean solution to prevent it from ever running in ...
13
votes
5answers
17k 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 ...
7
votes
5answers
13k views

Is there an app that will drain my battery?

Are there any apps that will specifically help to drain a battery down quickly? The scenario I would want to have this is if I want to quickly drain the battery so I can charge it fully again. Some ...
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: ...
4
votes
2answers
804 views

Is battery calibration important for Android phones?

I heard that battery needs to be calibrated for a first few usages. I heard that battery needs to be calibrated every 40 charge cycles. I heard that i must not let battery get too low and not ...
14
votes
1answer
424 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?
11
votes
6answers
3k views

Is it OK to swap batteries while phone is connected to wall charger?

It takes a few minutes to shut down and restart the phone, it would sometimes be handy to be able to swap batteries without shutting down (i.e. swap in a fully charged battery before going out). ...
7
votes
4answers
9k views

My phone thinks it's charging

After upgrading my Galaxy Nexus to 4.0.4, it keeps thinking the cable is being plugged in and out all the time. The battery discharges at a normal rate, even though the screen keeps lighting up as a ...
4
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 ...
4
votes
1answer
153 views

How can I monitor the device battery consumption?

I need information about which applications or hardware features discharge the battery. Built-in Android option for this doesn't fit because not all devices have it. Also it would be a great advantage ...
4
votes
1answer
8k views

How to debug a battery issue?

I have HTC Sensation 4G. I have a very peculiar issue with the battery. I've been using the phone for just over one year now. There are some periods (about 7 to 15 days) when battery performance is ...
4
votes
3answers
16k views

“Charging paused. Battery temperature too high” while connected to car charger

I have a Galaxy S2 with ICS. When I use it in my car, while it is charging from a car charger, I occasionally get this popup: "Charging paused. Battery temperature too high" Also Waze is running ...
4
votes
1answer
8k views

Cell standby and Phone idle

On the battery use screen, what are the differences between Cell standby and Phone idle items?
2
votes
2answers
8k views

How do I turn on battery percentage in Android L?

I haven't been able to find a menu option for this setting in the new Android-L developer preview.
2
votes
3answers
172 views

Battery usage by certain applications

Can I find out how much battery takes running of certain application? The goal is to minimize using applications that take a lot of battery and maximize battery persistence before having to recharge.
1
vote
1answer
2k views

How can I turn off the “low battery” noise?

I've started getting a loud beep notification when my battery hits 15%. Possibly this happened after an Audio Manager update but I don't see any settings in the app to change it. Previously the ...
1
vote
2answers
8k views

My phone keeps slowing down and burning battery. How can I debug performance and cpu consumption? (DHD 2.2)

I know there are already a lot of threads about suggestions on how to improve performance and, strongly related, save battery life on your android. I also have tried most of the tools to diagnose ...
13
votes
2answers
5k views

Why my phone battery has four terminal? what is the use of the fourth?

I have a LG Optimus One (P500). For sometime I am wondering why my phone's battery has four terminals. I am aware that two terminals are for the positive and negative points and the the third connects ...
8
votes
4answers
6k views

Which consumes less battery: Wi-Fi or 2G data?

I just want to know what consumes less battery Wi-Fi or 2G Data. My battery last long for 12- 16 hours only. I know there are lots of application which continually running and fetching data from ...