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

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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 ...
0
votes
0answers
1k views

Samsung Galaxy S2 battery gets hot

My Galaxy S2 is less than a year old. The battery sucks! I have to charge it more than once a day. Tonight, while on the charger, the battery life is actually going down. It's also way too hot to ...
4
votes
3answers
645 views

How do I determine which process woke up the screen?

The screen woke up at 4am or 5am at night, and had been on ever since. How can I find out the process that was responsible for screen-wake ups? The device is Galaxy S III running Android Jellybean ...
0
votes
0answers
2k views

Phone Radio uses 80% of my battery

I have GSam Battery Monitor, and it says that my Phone Radio is using about 80% of my battery. Why is this so high? I usually unplug my phone in the morning at 8AM, and I usually need to plug it back ...
2
votes
0answers
654 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 ...
2
votes
1answer
858 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
2answers
8k 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
297 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 ...
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. ...
1
vote
1answer
3k views

How much battery savings to expect from SetCPU? [closed]

Has anybody done any serious measurements as to effects of SetCPU (or a similar power-saving app)? I mean, are Google and Linux developers really that stupid not to properly implement power ...
13
votes
5answers
14k 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 ...
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 ...
9
votes
2answers
11k views

Google Services is killing my battery by keeping phone awake

In the last few days my Galaxy S3 has gone from lasting 12-13 hours to about 6 hours. On checking the battery monitor it seems to suggest that the phone is constantly staying awake and that Google ...
2
votes
1answer
3k views

Is using chargers of phone not meant for it harmful to the battery? [duplicate]

Possible Duplicate: Is my phone liable to explode if I charge it with a charger that came with a different phone? Are Android chargers universal in terms of power (Voltage, amperage)? As ...
0
votes
0answers
226 views

Samsung Skyrocket - Maximize Battery?

I have tried a few alternative ROMs, and underclock using SetCPU, but I can't seem to find a truly effective way to have my Samsung Skyrocket's battery last for more than a day. My average usage time ...
1
vote
0answers
345 views

Unexpected battery discharge on Samsung Galaxy S2

I charged my smartphone yesterday to full 100%. When I woke up today, I saw that battery was 40%. Android OS has used 90% of the battery. My Android version is 4.0.3. What is the cause of the problem? ...
1
vote
1answer
2k views

Android clearing recent applications list

After exiting the applications on my Galaxy nexus, they appear on the recent applications list. Do they still use CPU/battery? Do I have to remove them from recent applications list in order to save ...
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
1answer
151 views

Using a fully charged Galaxy Note

Is it safe to use a Galaxy Note that is fully charged and at the same time it is plugged in to the wall socket? I'm worried that the battery might be charging and discharging at the same time and it ...
3
votes
0answers
573 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 ...
-2
votes
3answers
3k views

Android ROM, RAM, Internal storage, External storage and Battery utilization [closed]

I would like to know how the Android OS manages memory for Applications. When are the various memory hardware components like ROM, RAM, Internal storage and External storage used during an ...
10
votes
3answers
6k 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 ...
1
vote
1answer
960 views

How to properly close running apps while avast! Mobile Security is installed/ running in the background?

I've just installed avast! Mobile Security on my Samsung Galaxy SIII. Runs perfect so far, but I can't close my programs running in the background anymore. I used to do this by pressing the button ...
7
votes
3answers
2k views

Why has my GSIII's battery life dropped from 50-60 hours to 16 hours?

I have a GSIII (Sprint) running Android 4.0.4. In the last three days, I have not made any changes or installed any new software that I know of, but my battery life has dropped such that my phone, ...
2
votes
2answers
512 views

Why android is power hungry? [closed]

When every android phone is released, all the reviews discuss about battery life of the device, since, they say, battery life in android phones is a critical issue. Question is : Why battery life ...
3
votes
2answers
5k views

msm_otg kernel wakelock preventing deep sleep

Ever since upgrading my stock Sprint Galaxy S3 to the official Jelly Bean release, my phone won't go in deep sleep at all, it's constantly at 384MHz. It's because of msm_otg kernel wakelock. Anyone ...
0
votes
1answer
3k 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 ...
1
vote
1answer
556 views

Beside shut down the phone, are there ways to prevent battery usage for Call Standby?

Beside shutting down the phone so that the battery will not be used for Call Standby or/and Phone Idle, are there other ways that can prevent the battery from being wasted? (Would the use of ...
8
votes
4answers
4k views

Battery level indicators: Do they consume more battery?

I have a Samsung Galaxy Y phone, the battery level indicator that comes pre-installed in the status bar, shows only a graphical representation of the battery level and does not gives a number ...
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 ...
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. ...
7
votes
3answers
312 views

How can I tell why my sleeping phone occasionally gets warm (and battery is draining abnormally)?

My two Android phones are doing the same thing, Motorola Milestone and Samsung GS3. From time to time, it is sleeping in my pocket and it will start to get warm and the battery is then draining quite ...
4
votes
2answers
2k views

Why is the com.android.browser process draining my battery?

I have a Samsung Galaxy Note with stock 4.0.4 ROM. The battery drains very fast and the phone is often warm. Reboot doesn't help. Settings says that com.android.browser (Internet) uses most of the ...
4
votes
1answer
66 views

How to see what applications do some actions when I power on my phone?

I believe there's some set of “hooks”, which get executed when I power on the phone. I want to see it to figure out the reason why my phone sometimes doesn't wake up properly (wakes with black ...
1
vote
1answer
530 views

Neo V with 4.0 ICS update — battery problem

My Sony Xperia Neo V battery performance has gone down very badly after upgrading to ICS. It mainly happens when I have my mobile data/internet turned on. How can I improve the battery performance?
1
vote
0answers
309 views

Handsfree profile sniff mode

I recently connected a bluetooth module (BTM511) to my Android phone (SG2 running android 4.0), using both the handsfree and the headset profiles. I notice that the Bluetooth device never goes into ...
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
0answers
167 views

Prevent complete charging?

I'm looking for a way to prevent my phone from completely charging every time it is connected to my computer. I want to reduce the battery's capacity loss, as it is non-replaceable, and it seems to me ...
7
votes
2answers
17k views

How do I recalibrate the battery of my phone?

After a year using my phone, I noticed the battery drains too fast, but after shutting down I manage to make it work again for a couple of minutes before it shuts down automatically. I read that to ...
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 ...
31
votes
1answer
67k views

What is *Cell standby* and how can I keep it from eating my battery?

Looking up my battery statistics, I almost always find Cell standby amongst the top consumers: I never thought that "idle" would use so much energy. I saw that other people encounter similar ...
16
votes
1answer
4k views

How does Android obtain battery temperature?

I am curious about the way Android phones obtain the battery temperature. Android has an API called BatteryManager which provides the value of instant battery temperature, but is there an actual ...
2
votes
1answer
3k 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 ...
6
votes
1answer
187 views

What happened to my detailed battery stats on my Asus Transformer Pad?

I have an Asus Transformer Pad tablet (TF300T). As with any other Android device I've owned, when I go to the settings menu and tap "battery", it gives me a detailed break down of which apps and ...
6
votes
1answer
485 views

Will charging a smartphone while it is in a case lead to damage? [closed]

Will it harm my Razr to charge it while in an Otterbox case? I heard that would cause excessive heat which would damage the battery or shorten lifespan. True?
3
votes
1answer
205 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? ...
61
votes
4answers
62k views

Battery Life and First Time Charging on Li-ion Batteries. Myth?

"Ok you bought a brand new mobile phone with brand new battery, after checking its working ok kindly switch it off and charge it fully (100%) then start using it. IT WILL INCREASE YOUR BATTERY LIFE.", ...
17
votes
2answers
3k views

Does 'poor' reception deplete the battery quicker?

In the area where I live I sometimes have trouble with reception. The Internet stops working for me or it takes time to load pages. The phone tries and tries to connect. It seems to me that when this ...
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
3answers
210 views

Configure power control in notification pane

I just bought an Alcatel One Touch 995 with Gingerbread 2.3, when I display the notification the notification pane I have some icons I can click to activate GPS, wifi, bluetooth, rotation... I know ...