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

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3
votes
0answers
303 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
4k 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
380 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
15k 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
885 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
2k 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
3k 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 ...
4
votes
2answers
20k 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
373 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
251 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
192 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 ...
12
votes
1answer
16k 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 ...
14
votes
5answers
23k 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
740 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 ...
1
vote
1answer
295 views

Why did a crash at 100% battery cause instant drain to zero?

After charging my Galaxy SII (ICS) overnight, I unplugged and started using the web browser. Battery indicated 100%. After 20 minutes the screen went black and the phone rebooted, then it popped up a ...
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 ...
6
votes
3answers
1k views

Is there a way to prevent applications from updating when running on battery

I know you can restrict applications to update on Wi-Fi only. Can you achieve the same thing with "update when charging on sector only" too?
-1
votes
2answers
1k views

Battery consumption

My stats are the follwing: Android system 37%, Stand by 36%, Inactivity 14%, Voice call 3%. I touch in android and appears a lot of programs like alertrecipients, google backup transport, error, ...
1
vote
1answer
152 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 ...
1
vote
2answers
293 views

How often does Android refresh the battery statistics listed in the Settings?

Does anyone know how often Android refreshes battery statistics? This screen is Settings > Battery. This may only apply to Android versions >4.0.
10
votes
3answers
9k 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 ...
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 ...
0
votes
1answer
189 views

Android Experiments drain battery

While I am experimenting with Android I found it annoying that the device even if is plugged in on the PC using a USB is discharging. THe problem is that I am performing some intensive experiments ...
4
votes
1answer
1k views

Download Manager causes high CPU usage on Motorola Razr with stock Android 4.0

My Razr (Stock ROM 4.0) is very very hot. After some research I found com.android.providers.downloads is responsible, since it's using about 60% of CPU. I have tried killing it, and it respawns, ...
0
votes
1answer
466 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. ...
4
votes
1answer
368 views

Why doesn't my device ever show 100% charged?

I have a Samsung Google Nexus S I9020A which showed fully charged @ 92%. 100% charging doesn't seem possible. What is the reason?
7
votes
2answers
6k views

Can I use my Nexus7 charger to charge my Android phone?

The Nexus charger has an OP Amp rating of 2A. The charger that comes with the phone has an OP Amp rating of 1A. Both have the same voltage. IP voltage is 100-250 V for both. I googled and came across ...
1
vote
1answer
1k views

Android Estimate Battery Capacity

I have a phone with 3.7v, 1500 mAH genuine battery. This being said, the maximum power that this battery can hold can be calculated easily: 3.7 v *1500 mAH = 5550 mV. I'm trying to see what battery ...
8
votes
3answers
14k views

Why is Android System always keeping my phone awake?

I woke this morning and discovered that my phone's battery was at 70% capacity, even though it had been fully charged when I went to sleep. I went into the battery settings, and found that Android ...
2
votes
0answers
42 views

Can over charging damage battery? [duplicate]

Possible Duplicate: Does constant charging harm my Android cellphone? Indeed, this is a duplicate of: Does constant charging harm my Android cellphone? Just for the record -- let's say I ...
2
votes
0answers
176 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 ...
1
vote
0answers
1k views

Samsung Galaxy III screen turning on by itself and draining battery

Even though I haven't received any notifications, the screen on my Samsung Galaxy III keeps turning on and draining my battery. What's causing this?
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 ...
0
votes
1answer
2k views

Turn off phone by holding the power button?

I've been having a small case of my screen not turning on at times. It happens on a 1 out of 100 basis. Anyway, I can confirm that the phone did not shut down because I can take screenshots (via power ...
15
votes
1answer
4k views

Battery drops 20% after reboot!

Battery on Samsung Galaxy S2 on ICS likes to drop after reboot. Actually it happened when I was on Gingerbread as well. Anyone can help me fix this? Screenshots:
17
votes
1answer
7k 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 ...
4
votes
1answer
920 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 ...
8
votes
2answers
12k views

How does the App “Battery Repair” work?

I just found this App (Battery Repair) on the Google Play Store, my question is how can it make my battery last longer. What optimazions are they doing? Has anyone tested this tool, does it work?
1
vote
1answer
4k views

can sony xperia u(st25i) 's otg be connected to external power?

Can Sony Xperia U be connected to a Y-Cable to provide extra power for OTG to avoid phone battery consumption? I'm asking this because the phone is already giving power ,will that make a short ...
1
vote
1answer
6k views

My phone is giving inaccurate readings of battery level

I have a Huawei u8160 running Cyanogenmod 7.2 . my phone is giving inaccurate readings of the battery charge level (e.g one day morning it was 33 that day evening it became 34 without touching the ...
1
vote
0answers
392 views

Inconsistent battery status and poor battery performance after ICS update on HTC Sensation 4G

Recently I updated my HTC Sensation 4G from GB to ICS via official update. After ICS update, I am facing many types of problems in my phone: Battery drain - 100 to 0% within 2 hours while browsing ...
7
votes
1answer
1k views

Why do I need to remove my battery periodically to fix phone problems?

On my HTC MyTouch 4G (Android 2.3.4), twice now the diagnosis for odd failures was to take the battery out, wait a minute, and replace it. (The first failure was loss of network; the second was web ...
6
votes
3answers
78k views

Charging paused. Battery temperature too high or too low

I have a Samsung Galaxy player that has been giving me the message "Charging paused. Battery temperature too high or too low". I left it unplugged and powered down all night, and it still gave me the ...
8
votes
1answer
624 views

What happens to the battery during bootloader/recovery?

I want to know what happens to the battery (does it charge/discharge/stay constant?) when the device is in bootloader or recovery mode. In both of these modes, a USB may or may not be connected. If ...
4
votes
1answer
163 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
9k 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 ...
5
votes
2answers
11k views

Can't find low battery threshold setting (Samsung Galaxy S3)

When the phone's battery reaches ~20%, I get the message to connect my charger on the lock screen. Is there a way to lower the threshold for the notification -- similar to the setting for a laptop? ...
3
votes
1answer
2k views

Tab stays on 216mhz instead of Deep Sleep

I am using Samsung Galaxy Tab 10.1 and I have installed Cpu SPY. I have noticed that when I leave the tab in the night, WiFi OFF, flight mode on, it does not go to Deep Sleep but stays on 216Mhz. I ...
6
votes
3answers
3k views

Although I was told to charge my Android device before first use, it was already charged. Have I been given a phone rejected by someone else?

I have just received my 'new' HTC one V. The instructions clearly state to charge the phone up before first use, yet the the phone switched on and showed full charge straight away, before I had chance ...
0
votes
2answers
1k views

Android phone discharges when it has 20% [duplicate]

Possible Duplicate: Why does my Nexus One power off with 15% power remaining? I've noticed that when my Google Nexus One phone is showing ~20% of the battery, after using it for a minute or ...