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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0
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0answers
4 views

How can I turn off data when my phone's screen is off and only let data come back on once per hour or so to sync apps?

I have been using an app called Doze which turns off data when my phone's screen is off. I'd like to find an app that would turn off data when the screen is off but would turn on data once per hour or ...
0
votes
1answer
1k views

How to debug “wlan_wake kernel wakelock” on an unrooted device?

The question is as short as the title. I've a Samsung Galaxy Note 3 & it has started showing issues where the CPU remains in lowest possible frequency (250Mhz) and it doesn't go to deep sleep. I ...
1
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0answers
13 views

Find out available mobile network bands in my area and disable scanning for unused bands

I have an HTC 626g+ which was supposed to be released in India, but I'm using it in Russia, which probably has different cellular frequencies available. I've read on certain forums that smartphones ...
2
votes
3answers
662 views

Why Google play services not included in Doze mode

I'm using Nexus 5 and 6P, Android 6 having a feature called "Battery optimization mode" or Doze mode (in short). It is allowing apps not to run, if they aren't used to avoid battery consumption. ...
2
votes
2answers
846 views

Why would Doze feature need motion detection?

I do not see any reason mentioned by Google for Doze mode to get activated only when the device is stationary. Is there any specific advantage for doing this only when the device is stationary? What ...
0
votes
0answers
14 views

Tasker: Tablet Power State

I am trying to wrap my head around Tasker, for a seemingly simple task, but am stuck. Here's the use case: I am using a marshmallow tablet as a remote control (irule). It has a charging dock...but ...
0
votes
1answer
25 views

Is there a way to automate data toggle on Galaxy S7 (Edge)

I recently bought a Galaxy S7 Edge. I've meticulously gone through settings for notifications, sync, permissions to eliminate things doing stuff in the background as much as I can find, but none of ...
0
votes
1answer
32 views

Why is my News & Weather app using so much data (and battery)?

I'm running Android 6.0 on an HTC M9. In the last 13 days, my News & Weather app has used 1.37GB of data. In that same period, Google Play Store used 1.22GB. For a few weeks now I have had ...
0
votes
4answers
5k views

Why is Youtube draining the battery and what could we do?

A friend of mine just asked me a nice question: His (stock) Samsung Galaxy S4's Youtube is draining his battery. He said, that he hasn't been in the app today, and this morning he had the phone ...
3
votes
1answer
30 views

How do alarms work with Period Battery Optimization?

My G4 just got delivered an OTC update (V30c-FEB-11-2016, not sure why I just got it now), that contains the troubling text: The battery will now be optimized automatically when the phone or apps ...
0
votes
1answer
102 views

Does You Android drains battery after system update?

I've recently received 2 updates for my Samsung Galasy S5 (SM-G900F) Android 5.0 There was security patch 2015-05-01, and some other update. I can not prove that, but my battery drains like 3x ...
20
votes
1answer
9k 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 ...
0
votes
1answer
36 views

Nexus 5 battery inaccurate

My Nexus 5 is very inaccurate with its battery life, it will usually die at about 90-85% but occasionally it goes to ~40% before dying. is there anyway for me to tell it "Hey! You have 0% battery, fix ...
3
votes
4answers
92 views

Samsung galaxy s5 battery Drainig fast

My device is Samsung Galaxy S5 SM-9000H. It's Battery drains very fast, even when screen is off. It drains 70% in night. It remains only 10% after 70% without doing anything. Does anyone have ...
0
votes
1answer
22 views

How can I get deep sleep -> coma for max battery life as comms platform?

I'm not an Androidite, just very curious. Arduinos have a timer-driven deep sleep mode that reduces their power requirements by 1000 or so. But it's a specialized and limited device, and a building ...
0
votes
1answer
36 views

How to decrease screen brightness without draining extra battery

I am currently using ZenFone 5 now with android OS 5.0. Even though I've set my brightness to the lowest but it is still too bright for me, and it's battery capacity is low too... so is there any ways ...
0
votes
1answer
25 views

What is the regular Nexus 5X autonomy?

I bought a Google Nexus 5X a week ago, and I'm surprised by the autonomy. Being 100% charged at 9:00 AM, at ~7:00 PM the battery is empty. I use about an hour of Spotify a day and Facebook & ...
9
votes
3answers
6k views

Do battery saver apps really work? Is it possible to save battery programmatically?

There are numerous apps in the Google Play store claiming to double or triple the battery life. Is it just a myth? Or can they really? If they really do save some power, why doesn't Android do it by ...
8
votes
0answers
304 views

How to diagnose battery drain on Android device using logcat?

I have been facing a severe battery drain issue on my official Cyanogenmod custom ROM. After discussing it on community forums, it was suggested that I use logcat for troubleshooting the problem. ...
3
votes
4answers
6k 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 ...
0
votes
4answers
7k views

Does cracked screen cause faster battery drain?

I dropped my Nexus 5 a week ago and the screen cracked diagonally 8cm from side to side. Since then I am sure that the battery drains faster than before. Previously I was always happy at how much ...
0
votes
1answer
412 views

New CPU spinning problem

I have a number of phones, a few droid 3's running 2.3.4 and some samsung S2s running 4.0.4, that all at the same time started having the exact same problem last week. They just started spinning cpu. ...
7
votes
3answers
9k 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 ...
-1
votes
1answer
117 views

How much impact can an SD card have in battery life?

I have a samsung tablet and since I bought the sd card I notice imapact on the battery. Unfortunatly I installed Android 5 by the same time (thatś why I bought the card), so its unclear if its the ...
3
votes
3answers
505 views

Is it possible, that old smartphone becomes slow simply because it is old?

I have 3.5 half year old Samsung / Google Galaxy Nexus i9250. The phone has become so slow after that time, that it is simply being unusable. Launching any application, as simple as Gmail or Calendar ...
5
votes
1answer
930 views

Mysterious heavy battery drain during device sleep since update to M

I recently updated my Note 3 to Marshmallow, using the resurrection remix rom, and I am experiencing excessive battery drain I cannot pinpoint the source of. I am a very light device user, prior to ...
0
votes
0answers
190 views

Samsung Galaxy Note 4: greyscale mode disappeared after upgrading to marshmallow

Today I've received the late Marshmallow 6.0.1 update. It has some unpleasant side effects: Battery is draining fast Greyscale mode has been disappeared A very ugly grey bar is showing whenever ...
2
votes
0answers
40 views

Persistently or aggressively enabling Battery Saver

I love the Battery Saver feature. When I'm travelling or in other situations where reliable communication is more important than user experience, I want to always have it enabled, sometimes for days ...
0
votes
1answer
39 views

Android Batterystats Report

I'm working on a research project about Android smartphones power consumption. Using "adb shell dumpsys batterystats" interesting stats can be obtained. For example: Statistics since last charge: ...
1
vote
0answers
53 views

How to make Snapchat use less battery/network?

I barely use Snapchat, less than 10 text snaps per day, only one or two 300KB pictures, and I almost never watch nor send videos. I never use the rightmost activity (branded content). Despite this ...
1
vote
3answers
92 views

Mysterious battery drain

My battery has dropped more than the sum of the usage by all of my apps. Has anyone ever experienced this before, or know where the rest of my battery is going? Click image for larger version
1
vote
0answers
105 views

alcatel onetouch FierceXL battery is draining too fast

I've only had my onetouch for 3 weeks now and all of a sudden the battery started draining rapidly, even when I plug it into the charger, and charging very slowly. If i use the phone at all when its ...
0
votes
0answers
35 views

Setting up super-minimalistic phone for the sole purpose of GPS-tracking my car

Background I'm considering using my old Galaxy S3 as a GPS tracker in my car. I'm not necessarily worried about theft, but I'm a statistician at heart, and I like seeing data pertaining to my own ...
3
votes
0answers
52 views

Force “Battery Saver” mode in Android Lollipop Cyanogenmod

Forcing "Battery Saver" mode seems to be possible via Settings -> Battery -> Battery Saver -> On using some Lollipop phones, but on my CyanogenMod 13.0-20150316 there is no such option: ...
6
votes
2answers
5k views

Can Android app repair battery's bad cell?

I know this was covered in a different post, but I've been wondering how this app can actually make a difference in battery life. I've tried many of these, and "Repair Battery Life" is the only one ...
0
votes
1answer
128 views

Nexus 5X, Gmail draining battery after may update

Ever since the may update, the gmail app has been consuming a crazy amount of battery. My battery used to last like 16 hours, now it's only like 5 hours. Anyone else experience this?
1
vote
0answers
35 views

Charging Behaviour Changed After Using Car Charger

On a recent road trip, I used a car charger to re-charge the battery on my Nexus 5 phone. Ever since, I have noticed a significant increase in the time required to charge the battery, even when using ...
35
votes
4answers
42k 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 ...
0
votes
1answer
42 views

Locking the speed of the cpu on an android phone

The battery life of my cell phone lasts for about 6 hours. About 2 days ago I downloaded the app CPUControl to reduce the speed of my CPU. This resulted in more than 20 hours of battery life. However ...
11
votes
5answers
49k views

Will constantly having Bluetooth on drain my battery too fast?

I'm thinking about making an app which will require Bluetooth to be available at all times. However, if this reduces battery charge life significantly, then that's kind of a show stopper. Can anyone ...
5
votes
3answers
2k views

Does switching user accounts in Lollipop affect battery life or performance?

I recently updated my Moto G2 to Android Lollipop via OTA update. I've successfully installed the update(around 500mb i guess). I saw the new feature of adding new Guest and New user acccounts just ...
1
vote
0answers
2k views

Is there a battery cycle counter app?

I have an HTC One M7 (4.4.2), and the battery is starting to deteriorate. It may be that I have some misbehaving apps, but I'd be curious to find out the number of charge cycles my device has used ...
1
vote
1answer
5k views

Battery life issues on Xperia Z1 after Lollipop update

Since the update of my Xperia Z1 to Lollipop (5.0.2), my battery life is horrible! It takes a very long time to charge it to 100%, and I can only use my phone for a few hours. How can I fix it ?
0
votes
1answer
45 views

Interchanging battery with a higher capacity battery

My Redmi 1s has a battery capacity 2050mAh (BM41). And the upgrade of the phone is Redmi 2 with capacity 2200mAh(BM44). Can I use this battery if it fits in my device? Will it creates any software ...
-1
votes
2answers
144 views

Is auto sync really killing my battery?

I have been digging the archives for eternity to find that Location Services and Auto-sync (assuming we ignored other factors such as Bluetooth etc -- because my focus is mainly about auto sync) are ...
8
votes
1answer
123 views

Is battery consumption linear?

I am benchmarking an app using the batteryhistorian. The result is a chart where every percentile is a "tick". After I've measured the battery consumption and let the battery drain to half, I would ...
1
vote
0answers
576 views

Enterprise (802.1x) WiFi causing excessive battery drain?

In the past week, realised that WiFi at work (using 802.1x auth) has been draining my battery like crazy. Here are some stats I took over the past few days: Case Connection Duration ...
0
votes
1answer
60 views

How to find out which apps are draining the battery?

I'm not sure when it started, but my phone is draining its battery even when being charged. It's likely to be caused by some apps I installed recently. How to find out which apps are causing the ...
0
votes
1answer
56 views

Are wakelocks only when screen is off?

If so, can I block all third-party app wakelocks since I want the apps to run only when my screen is on? I understand that this would break some functionality like receiving whatsapp messages when ...
0
votes
0answers
11 views

Is auto-sync really the biggest battery killer? [duplicate]

I have been digging the archives for eternity to find that Location Services and Auto-sync (assuming we ignored other factors such as Bluetooth etc -- because my focus is mainly about auto sync) are ...