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

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2
votes
0answers
543 views

Tablets that run without a battery [closed]

I want to run a tablet in an environment where it will always be plugged in. In this situation, a battery is unnecessary and will just degrade over time. Are there any tablets that can run without a ...
0
votes
1answer
178 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
822 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
354 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
312 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
716 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
9k 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
37 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
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 ...
1
vote
0answers
920 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
1k 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 ...
14
votes
1answer
2k 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:
16
votes
1answer
5k 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
747 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 ...
6
votes
2answers
6k 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
3k 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
3k 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
357 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
795 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 ...
5
votes
3answers
49k 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
462 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
146 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
7k 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
7k 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
2k 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 ...
8
votes
4answers
5k 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 ...
1
vote
1answer
309 views

What information is more reliable — battery capacity or stand-by time?

Stand-by time (not talk) because I rarely use the phone actually ;-) Let's say there are two phones -- Xperia Mini and Wildfire S -- both have very similar battery 1200 mAh and 1230 mAh ...
1
vote
0answers
115 views

How do I turn off my maps app (that's taking 93% of my battery) on the Smart II? [closed]

I have the new Smart II. Maps is using 93 percent of my battery and I can't turn it off. I keep pressing force close but it comes back on a few seconds later.
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 ...
3
votes
1answer
1k views

Nexus 7 System error 'show low battery logo'

Today I finally got my Nexus 7 though the post and turned it on; I was just checking charge. I got an 'out of battery' UI message and the tablet then turned itself off. I plugged in the USB charger ...
4
votes
3answers
14k 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 ...
3
votes
1answer
15k views

Show battery percentage on Nexus 7 (Jelly Bean)

Is there a (preferably built-in) way to show the remaining battery percentage in the status bar on the Nexus 7 (4.1.1)?
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, ...
2
votes
3answers
5k views

Reset battery history after unplugging charger?

As far as I can tell, the stats on the Battery page of Settings records the time from when the battery is booted up onwards. What I'd rather want it to do, is to reset that counter whenever I ...
0
votes
1answer
1k views

Battery Savers with the Android 4.0 [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android device? How do I save on my battery on my new 4.0 (Ice Cream Sandwich) device? All I have seen so far is a bad ...
0
votes
1answer
710 views

How to have a long Standby and Battery -life? [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android device? My Huawei Android is dead after one day. I am looking for ways to extend the battery life a new Android ...
1
vote
1answer
3k views

Reset battery status after changing battery?

If I plug in the charger of my Galaxy Nexus, I'm able to replace the battery without switching the phone off. However, the battery status does not adjust to the new battery. For example, if I replace ...
5
votes
2answers
1k views

Can I save my htc desire if the battery is dead?

I ran my HTC Desire on a 0% charged battery - and it shut it self down. Now it won't charge anymore and wont start even when plugged in. What are my options?
4
votes
2answers
2k views

my battery charge indicator is continually flashing on and off

My battery charge indicator (the screen info saying % full), flashes on/off/on/off, etc. sometimes. I've switched the battery to a spare to see if that helps but it didn't. When it does happen, ...
0
votes
1answer
271 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
2
votes
3answers
166 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
2answers
2k views

Asus Transformer slow charge

My ASUS Transformer TF101 charges extremely slowly using the original power adaptor. I'm trying to figure out the cause. Here are all my knowns: The power block (wall to USB adaptor) charges my ...
5
votes
5answers
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 ...
2
votes
2answers
265 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 ...
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 ...
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). ...