Questions about Battery life (how long each charge last) or/and Battery Durability (how long until it needs to be replaced) should use this tag.

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4
votes
1answer
1k views

Is there any reason not lock the CPU frequency to the minimum while the screen is off?

To save battery, I have created a "screen off" profile with SetCPU that locks the CPU frequency to the minimum while the screen is turned off. Could this have any negative side effects on apps that ...
4
votes
1answer
276 views

Battery level on Asus eee pad Transformer with dock

I'm wondering if anybody knows how the battery level is measured on the Transformer when the dock is connected. I fully charged the other day, and after few hours of use the battery level was still ...
4
votes
1answer
1k views

Can anyone reccomend a 2g / 3g switching widget?

I've just got my new HTC Desire HD and I want to switch 3G on and off as required. I used to do this on my old HTC magic and got quite good battery life compared to some friends with the same phone. ...
4
votes
2answers
2k views

Which uses more battery? 4G lte internet or Wi-Fi?

I usually am within range of my Wi-Fi hotspot, and am using a Samsung Galaxy Note II. I've always wanted to know whether I'd have better battery-life if I was to turn off Wi-Fi? I have unlimited 4G ...
4
votes
2answers
13k views

nlpwakelock and “Use wireless networks” option

Under "Location services" there is a "Use wireless networks" setting - whenever the setting is on, I get constant "nlpwakelocks" and the battery drains a lot faster. However, I see that this was ...
4
votes
3answers
220 views

When did my phone power off due to low battery? Is the information recorded somewhere?

I'd like to know when my Android phone powered down due to low battery. Is there a log or way to see this? I am running a new program that makes use of BlueTooth and I suspect that's the problem. I ...
4
votes
1answer
2k 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. ...
4
votes
2answers
320 views

Suspend a phone

I was wondering if I could suspend my phone. Let's say I'm running out of battery and I'm also expecting an important call in a few hours time. Instead of shutting down the phone and starting up ...
4
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 ...
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
147 views

“Phone” item using 10-15% of Battery Life

I've attempted to search for other questions answering this, but keyword ambiguity is working against me. On my Galaxy Nexus, my battery drains rather quickly. Very frequently, when viewing the ...
3
votes
3answers
248 views

What is my phone doing at 1 o'clock in the morning?

I have recently installed JuiceDefender (JD) and along with it JuicePlotter (JP). JP gives me a nice graph about my energy consumption over time. I noticed that around 1 A.M. my phone uses up more ...
3
votes
1answer
580 views

Minimized Apps: Do they consume more battery?

If I keep one or more app minimized in my Android Phone (Samsung Galaxy Y) will my mobile's battery will be consumed faster than if I had not minimized any application at all?
3
votes
1answer
293 views

What way of controlling volume is more battery efficient?

I have a headset with it's own volume control, and I can also control the volume of the music through the android's volume control keys. But which way of controlling is more battery efficient? ...
3
votes
2answers
991 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 ...
3
votes
1answer
7k 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 ...
3
votes
2answers
3k views

What can I do to increase battery life on my Android tablet?

Tablets have different usage profiles than phones. So many of the "Phone" suggestions don't apply. So, what can I do to get better battery life on my Android Tablet. (TechPad 7" Tablet from ...
3
votes
2answers
440 views

Is there a way to see which apps are using GCM?

I'm interested to know how many of the apps I have installed are using GCM. Is there a way to find out?
3
votes
1answer
10k views

How can I boot my Nexus S with a broken power button? Can only boot to “Do not turn off target”

My Nexus S power button has stopped working and Samsung will not honor the warranty. The farthest I've gotten is to the Downloading screen with the yellow work ahead sign, that says "Do not turn off ...
3
votes
1answer
100 views

Why are individual apps not listed in my battery usage statistics?

I'm using an Asus Transformer TF300 running Ice Cream Sandwich. When I check Settings->Battery the only things listed are Screen, Tablet Idle and Wifi. Why aren't apps that I use being shown in ...
3
votes
1answer
984 views

Improve Android battery life by lowering CPU freq

I would like to know if it could be possible to use adb (Android Debug Bridge) to tell the phone to lower its CPU max freq. I'd like to use less battery if possible, and in my use case I don't mind ...
3
votes
2answers
7k views

Google Services battery drain on Galaxy devices

Here are screenshots from my three Samsung Galaxy devices: Samsung Galaxy S3 (left) and Samsung Galaxy S4 (right; click images for larger variants) Samsung Galaxy Note 10.1 2014 (click image to ...
3
votes
2answers
6k views

Galaxy S3 cell standby is eating my battery

My battery on my new S3 seems to be being eaten up by the cell standby using more than 50%. I appear to get a decent signal on the phone. Does anyone have any idea why this figure would be so high?
3
votes
1answer
86 views

Can anyone explain to me what the % really refers to in the Android system, battery usage?

I am wondering what the different percentages really refer to in the battery usage section. I mean...in total I see more than a 100%. So it is easy to presume that it doest mean a certain percent out ...
3
votes
1answer
153 views

Why did my battery usage on 3G grow with the Android 2.3 update?

There were different nice features followed by the official update of Xperia X10 to Android 2.3 like the sound stuttering, but the most annoying is the following. I live in the Netherlands and here ...
3
votes
3answers
283 views

Phone kept awake for half an hour after arriving home

My Moto X (2014) running Lollipop 5.0.1 sometimes starts chewing through battery upon arriving home after being away (or, possibly, getting back on a wi-fi connection is the trigger?). It does this ...
3
votes
1answer
3k views

How can I increase my Samsung Galaxy Tablet 10.1 battery life?

How can I increase my Samsung Galaxy Tablet 10.1 (Android) battery life? I am going to use my Samsung Galaxy Tablet 10.1 (with WIFI and/or 3G) for marketing purposes: It's going to play a movie non ...
3
votes
2answers
627 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
1answer
327 views

Is my battery faulty

I've had my HTC Desire (latest legit firmware) for 18 months or so, and I believe this problem has existed for a while but it getting worse. It might just be time for a new battery but in case ...
3
votes
3answers
424 views

How can I prevent the battery in my Nexus S from draining overnight?

I have a Google Nexus S and for the past 2-3 days whenever I go to sleep the battery drains completely overnight. I mean when I go to bed the charge on my phone is plus 90% but for the past 2 days ...
3
votes
1answer
621 views

Is there any known memory leak in Gingerbread 2.3.3 fixed by occasional reboot? Related to battery usage?

I notice that when I reboot my Samsung Captivate, it runs smoothly for about 2 or 3 days. After that, I notice that there is a lot more lag with various apps, and the launcher screen is more likely ...
3
votes
4answers
1k views

Battery usage problem in Android 2.3.6

Since the update to Gingerbread the battery of my phone has the half duration than with the 2.3.4 version. The "Battery Usage" in settings don't show anything abnormal. Anybody have the same ...
3
votes
1answer
393 views

HTC Evo - Can Wi-Fi Radio Sleep?

I've noticed that when actively downloading a lot of data, the Wi-Fi radio uses much less power than the 3G radio. However, when the phone is not being used much, the 3G radio will sleep but the ...
3
votes
3answers
567 views

Ways to improve battery life on Droid Incredible?

Out of the box, I noticed my Incredible has a lot of stuff running/turned on by default. Besides the basics of turning off WiFi, GPS, and BlueTooth when I'm not using them, are there more steps I can ...
3
votes
1answer
240 views

Battery Drain from mysterious wake locks

I have an huge battery drain issue on my OnePlus One running Android 4.4.2 on stock ROM CM11s O5Q with FrancoKernel R35. I googled and searched so many times but couldn't find anything and I am really ...
3
votes
4answers
2k 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 ...
3
votes
1answer
362 views

How do I 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 ...
3
votes
0answers
595 views

MS Exchange with Default Email App is Randomly Draining Battery!

I'm using my Exchange email account for work with the default Email app on my Nexus S running Jellybean... usually everything works just fine, but within a week or so it'll start consuming massive ...
3
votes
0answers
624 views

Battery life in Samsung Galaxy 3

I recently updated my Samsung Galaxy 3 to Android 2.2 . After the update my fully charged battery dies in just 3 hours(without any use) and around 1 hour if I use it (talking,browsing etc). I am using ...
2
votes
2answers
434 views

Brightness and battery use

When I turn down the brightness of the screen on a Samsung Galaxy Mega am I lowering power consumption or increasing the opacity of the screen?
2
votes
1answer
4k views

Android battery usage (3G, HSDPA and Edge)

In order to reduce battery usage I checked the Use only 2G networks from Settings > Wireless & networks > Mobile networks on my Android. Then I noticed the E icon appeared instead of H on ...
2
votes
1answer
4k views

Power Saving Option in Samsung Galaxy S3

I see there is a Power Saving switch in the Galaxy S3. What makes the Galaxy S3 save power when it is turned on? Is there a difference this and using JuiceDefender? Can using JuiceDefender and ...
2
votes
2answers
2k views

Are the Battery Doctor and/or CM Family Suite app(s) needed? [closed]

I've got an HTC One M8 with KitKat 4.4.4 until Lollipop 5.0 comes out in January. I'm a convert from Apple iPhone Gen 1 all the way up and this is my first Android device ( which I love BTW ). With ...
2
votes
1answer
474 views

How to disable Google Search?

Recently my phone started to lose charge faster. It just occurred to me to check Battery in Settings, and I saw that Google Search is responsible for 29%, Screen coming in second with 23%. I set up ...
2
votes
1answer
2k 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 ...
2
votes
1answer
5k views

Turn off Wi-Fi Power Saving?

Is there a way to turn off wi-fi power saving mode on Android, i.e. have the wi-fi radio stay on at all times? I'd rather have a stable, low-latency wi-fi connection and slightly less battery life ...
2
votes
2answers
644 views

Battery Statistics Viewer crashes every time

I have a DroidX with Android 2.2 I went into the Battery Usage settings Settings > Battery Manager See a fual cell looking battery image that says Touch for usage statistics, so I was like awesome ...
2
votes
2answers
2k views

Which uses more power/drains more battery: HTC Evo 3G or 4G?

I've read mixed reports online about which radio uses more power -- 3G or 4G. Has anyone done any semi-scientific tests that would answer this question? When constantly downloading data over the ...
2
votes
1answer
75 views

How to preserve battery while trekking remote locations?

I will use my phone while trekking in a remote area and want to conserve its battery. I won't have phone or wifi networks, but I want to record my track using Google's My Tracks and take photos. How ...
2
votes
3answers
1k views

How long device has been running since last charge?

In Android Lollipop, how do I see how long it has been since the last time I charged the battery? I mean I can get the approximate time by eye-balling the graph shown in Settings -> Battery. But, is ...