Battery life is important for mobile devices. Questions regarding battery life should use this tag.

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0
votes
2answers
6k views

The battery of my Galaxy S 2 is draining very quickly…including on plane mode

I just got a Galaxy S II which I upgraded to ICS. I really struggle with the battery life. I have been looking around a lot on the forums explaining how to save my precious battery. I have done ...
2
votes
1answer
5k views

Should I keep my Android tablets' power off or leave them on standby mode?

Should I keep my Android tablets power off or leave them on standby mode? Which option is better? I have two tablets: Allwinner A10 single core 10 inch (old one) and Allwinner A31 quad core 9.7 inch ...
0
votes
0answers
51 views

How long has my app been active?

I know that in my settings I can view how much battery my apps have used, but is there any way to detect for how long an app has been active? I would like to know how much time I spend on Facebook, ...
1
vote
2answers
126 views

Full battery completely depleted within a few hours without any user activity — what to do?

I left my phone on the table with full battery without doing anything with it. After a few hours the battery was completely depleted, and the phone automatically shut down. What could cause such a ...
26
votes
3answers
24k views

How to deal with (orphaned) WakeLocks?

I guess most of you at least have heard about WakeLocks. Many of you will have experienced them already -- wether knowingly or not. Some may know how to deal with them in general -- but only few know ...
4
votes
2answers
3k views

What do CPU Total, CPU Foreground, and Keep awake mean?

I've been keeping an eye on my battery usage on my Android device (HTC One), mostly to see if I can drain it during a full work-day, and I came across the app usage details under the Power settings. ...
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 ...
1
vote
3answers
6k views

GPS Battery Drain — LocationManagerService

EDIT 3: Someone pointed me in the right direction on another forum. There was a bug with HD Widgets that rolled out yesterday. HD Widgets Bug As of yesterday I am getting a 35%/hour battery drain. ...
4
votes
1answer
11k views

Display screen keeps waking up when locked

When I lock my Samsung Galaxy Nexus by pushing the power button, my phone's screen darkens for a few seconds, then keeps staying awake with the lock screen displayed. This keeps eating away at my ...
-2
votes
1answer
21k 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 ...
2
votes
0answers
20 views

Is it safe to keep Android charging through USB all day? [duplicate]

When I'm in front of the computer, I always keep my Android phone plugged into a USB cable so it's always at a 100% charge and I can type text messages from the convenience of my PC keyboard. Still, ...
0
votes
1answer
60 views

How to stop all but 1 one app including their services?

My HTC Sensation's battery does not last long. I'm going for a Marathon race which should last at least 5 hours and I'm going to use 1 app (RunKeeper) for that period. I would like to preserve as ...
0
votes
1answer
10k views

Why are Dialer, Cell standby, and Phone idle killing my battery?

HTC G2 with Cyanogenmod 7.2.0, T-Mobile. It used to last all day, I'd always plug the phone in before bed and it would rarely run out of energy before then. Lately it runs out mid-day. Today I ...
7
votes
2answers
2k views

What uses most power: GPS or WiFi?

When playing Ingress I find that both GPS and WiFi (each by themselves) provide an acceptable location accuracy. My question is what draws the most power? I'm interested in technical information ...
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 ...
1
vote
1answer
435 views

What does power saving do exactly?

What changes happen in functioning of the phone after you turn it on? My device: Samsung S3 Mini
1
vote
0answers
729 views

Galaxy S3 Mini drains excessive battery when Wifi is ON

This question is linked to this one: Wifi battery saving tips or automation This time, the question is different. I have here a Galaxy S3 Mini phone that behaves strange. When Wifi is OFF, battery ...
1
vote
2answers
21k views

Why is “Samsung Push Service” using so much of my battery?

Looking at the battery usage summary on my Galaxy Ace Plus (GT-S7500), I found that "Samsung Push Service" (v1.0.4) has used 29% of my battery. I'm having problems with the battery not lasting very ...
17
votes
3answers
5k views

What is USB debugging? Can I keep it ON forever?

Sometimes I need to transfer some music from my PC to my Galaxy S2 and must always activate USB debugging. Then I think, can I keep it ON forever? I mean, Keep it ON for ever can give me a problem ...
10
votes
7answers
4k views

What effect does tasker/locale have on battery life?

Locale and tasker look pretty cool. How much effect will they have on battery life?
6
votes
3answers
3k views

What kind of power saving smarts does Android already have?

I just d/l tasker and it's been really interesting (although not as interesting as I would've liked since I feel a lot of the good features require a root). I would like to optimize my Galaxy s3 so ...
0
votes
0answers
572 views

Battery conservation? [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android phone? What are some general ways to improve the battery life of my phone?
0
votes
1answer
267 views

App to show battery current or rate of change of voltage, short term info

Id like to have quick feedback about how what I do on my phone affects power usage, but cant seem to find a good widget or app for that out of the hundreds out there! Anyone know any? Thanks
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 ...
2
votes
1answer
861 views

Can rooting be the cause of battery drainage?

Its been three weeks I have rooted my phone. I have installed a lot of apps using link2sd on external sd card. I have noticed that since the rooting, the battery goes down very fast. 80% of charge ...
13
votes
6answers
1k views

How can I improve the battery life on my device? [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android device? My Desire is absolutely great, but with my usage the battery life is really a big problem. I have a few ...
4
votes
5answers
875 views

power consumption by application?

Since cellphone application software requires extra power for processing. Is there any application software that indicate power consumption by particular application?
8
votes
2answers
1k views

Power draw from GPS - Does granularity affect amount of power drawn?

We all know that GPS draws a considerable amount of battery power. Does anyone know of any studies that test the "granularity" of a GPS signal with how much battery is consumed? I'm not talking ...
2
votes
1answer
400 views

Locale powersave plugin & Power Control widget

I use Locale app with powersave plugin. 3G is usually switched off except during scheduled syncing to save power. There are occassional situations when I would like to use 3G and I would like switch ...
21
votes
10answers
14k views

How does power usage for data over WiFi compare to data over 3G? (Ignore LTE for now)

If you have unlimited data over 3G so that cost is no option, which is more power efficient? Using the WiFi or 3G connection for data usage? Extending battery life being the goal
0
votes
1answer
162 views

Can any Android device be set to not auto power-off?

If I buy any no-name Android tablet from ebay etc, is there a chance it will not allow me to force it to stay on all the time? In other words, is "never auto sleep" a universal feature of any android ...
5
votes
1answer
2k views

Should I disable mobile data while I'm connected to WiFi?

If WiFi is activated, the phone expends energy trying to find WiFi connections, even if I'm not using the internet. Is the same true for mobile data? Does the phone expend any energy trying to keep a ...
0
votes
1answer
337 views

Prevent runaway threads and ultimately physical overheating and battery drain on Android

I was wondering if there is a system monitor app that will raise (audible) alerts and offer app closure if it detects runaway threads on Android that cause physical overheating and battery drain. ...
1
vote
1answer
152 views

Power management on Android — is app CPU correlated to power usage?

2 questions: Is application CPU usage on Android correlated and how highly to battery usage? In other words, are apps that suck a lot of CPU also draining the battery or not necessarily? Is there a ...
2
votes
0answers
223 views

How to keep CPU off when charging?

When I connect the USB power source, it makes CPU to stay on (even though "Development->Stay awake" is off). When charging from a weak power source if makes battery to drain even faster than is case ...
8
votes
2answers
677 views

Easiest way to reduce power consumption to phone only

Sometimes I'm in a situation where I can't charge and want to have phone service as long as possible. I won't care if nothing else is enabled. What's the easiest way eliminate as much other power ...
3
votes
2answers
502 views

How can I return from power-saving mode in Android 2.3?

I'm using a Samsung Galaxy S II Epic (with Android version 2.3.6 installed), and whenever my phone reaches 10% battery life it prompts me to turn on power-saving mode (and I do). However, once my ...
3
votes
2answers
721 views

How To Prevent Uploading From Interrupting When Screen Is Off?

When screen goes off, uploads get interrupted especially YouTube uploads and everytime i have to resume phone to continue uploads. The problem is that in case of YouTube, videos stutter which i assume ...
11
votes
7answers
6k views

Power saving tips for Galaxy S2 that don't involve turning it into a dumbphone

My Galaxy S2 has always shown not more than 8 hours of battery life. This is with the stock ROM, as well as the recent 2.3.5 update and a rooted kernel. All the battery saving tips I've seen ...
2
votes
2answers
257 views

Power saver turns display brighter. Shouldn't it be darker?

When my battery is running low, the power saver turns on. When that happens, my display gets brighter. Shouldn't it be turning darker to reduce the power consumption? Is it normal to get brighter or ...
4
votes
1answer
1k views

Auto sync only when connected to a specific wifi network

I am getting rather low battery life when using auto-sync on 3G. I have wifi in college and at home, so I'm looking for a way to enable auto sync only when connected to those 2 specific wifi networks. ...
0
votes
1answer
361 views

WiFi tether without losing battery

So, as everyone already knows, when tethering data over WiFi your battery may overheat/lose battery/etc. What I want to do is while in my car: Stream internet over WiFi to >1 person Navigate with ...
15
votes
3answers
5k views

Battery - do they last longer if recharged when empty?

I'm about to buy a Samsung Galaxy Ace (it's not much expensive and I think it's a pretty good phone), however everyone has been complaining with the battery life but admitting that isn't bad compared ...
4
votes
2answers
475 views

Service that syncs pictures only when charging

I've been using Dropbox camera upload to automatically sync my pictures to my PC using my data plan (this part is important, I can't use a wifi). However, this autosync eats up the battery like ...
1
vote
1answer
373 views

How do you change the screen background on Nexus S?

Just bought a Samsung Nexus S. No manual came with it. Apparently the moving default screensaver eats up heaps of battery life and I am not getting much battery life out of this new phone and I am ...
2
votes
1answer
761 views

What is preventing my Android phone from going to sleep? It is eating through the battery quickly

My phone is the Motorola Droid 1, rooted and modded with CyanogenMod 7. This problem did not occur before I modded it. When I check the battery stats, the awake bar is always solid, so something is ...
1
vote
1answer
650 views

Battery usage for keeping apps open

How much of an effect does it have on the phones battery life to keep applications such as the contacts application open. I ask because that app sometimes takes long to open the first time depending ...
0
votes
3answers
12k views

Battery drain with in no time in Samsung Galaxy Ace

I have Samsung Galaxy Ace for almost an year now. The battery of my phone get discharged now with-in no time of charging. The battery status in Setting -> About Phone - > Battery use shown 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 ...
2
votes
1answer
2k views

Why does my myTouch 4G lose battery so fast?

So I formatted my phone today. I have not used it, and it was at 100% this morning. No apps installed, the screen was only on for about 10 minutes. Yet when I go to check it now, about 12 hours later, ...