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.

learn more… | top users | synonyms (3)

5
votes
1answer
598 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
27 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
29 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
26 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: ...
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 ...
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
vote
0answers
36 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
68 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
56 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
32 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
30 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
4k 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
0answers
71 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 ...
0
votes
1answer
99 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
27 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 ...
34
votes
4answers
41k 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
30 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
46k 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 ...
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
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
4k 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
40 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
102 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
121 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
575 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
56 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
44 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 ...
1
vote
1answer
42 views

Help me save battery, BBS dump included

I got fed up with my Android battery life and thought I should use it only when really required. Hence, I installed minimum number of apps. I have runtastic, runkeeper, gps status toolbox, ...
0
votes
1answer
4k 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 ...
1
vote
2answers
67 views

What to do after replacing the phone's battery?

I have a Nexus 5 (1.5yo; I know, it's old but still worthy!) and the boy was heavily suffering from short battery discharges. I'm a phone heavy user so I figured out I had depleted the battery's life, ...
2
votes
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 ...
0
votes
0answers
174 views

Bizarre new battery behavior on Samsung Galaxy S3

After my old battery puffed up, it was time to buy a new one for my Galaxy S3 (GT-I9300) on stock ROM. After I got my new battery, I put it in and turned on the phone as I had some urgent messages to ...
2
votes
1answer
72 views

Get battery usage data at finer resolution

The biggest battery usage culprits on my phone, according to both the battery settings page and to GSam Battery Monitor, are always "Android System" and "Android OS." I also have "Watchdog" installed, ...
0
votes
1answer
25 views

Does boot take up any significant power?

If I wanted to conserve energy, and needed to check on my phone once every while, would turning the phone off and on every 30 seconds actually conserve more power than if I had it on all the time? ...
1
vote
1answer
49 views

WiFi only working while charging the phone

I am being experiencing this very strange issue in the last couple days. I have a Samsung Galaxy S3 Mini with an (unofficial) build of Cyanogenmod 11. Is has been working fine for the last year with ...
2
votes
1answer
79 views

Power consumption of audio over OTG cable

I recently found that if I connect a USB pair of speaker/microphone using OTG cable to a phone, it becomes the audio device by default, and I can actually play audio over that. It happens that the USB ...
1
vote
1answer
79 views

NFC battery draining through constant use

Does putting a device that constantly checks/uses NFC affect/drain the battery? One example is Dimple IO which puts NFC buttons on the back of your phone.
1
vote
1answer
2k views

Notification LED's generic power consumption

I know that all phones got different hardware, and that leads uses just a little power, but: What if I set my LED notification frequency to high (like the light will pulse faster)? How much would ...
2
votes
3answers
116 views

What happens to CPU frequency when Android downloads a large file with screen off?

For example, I start downloading system update file and hit the power button to dim my screen. What happens to CPU? Does it lowers its frequency or change its governor to powersave? Or does CPU ...
2
votes
2answers
11k views

Stop SD card from constantly unmounting due to underpowered

I had problems with constant unmounting of my SD card from phone when it was not on charger. The problem was with powering off some power when disabling display to save energy, but this power was ...
23
votes
7answers
3k views

Is power consumed from battery to run the phone when charging?

I want to download torrents while keeping the device plugged to charge. My device is made by Samsung. Is the power consumed from charger, or battery, to power the device when charging? Will my ...
4
votes
1answer
5k views

Power Efficiency: Network mode 4G LTE vs 3G GSM/WCDMA?

Which network mode is more power efficient: LTE 4G or GSM 3G? I assume using a 4G network uses more power even if you don't use the data connection, as from the little I understand about mobile ...
5
votes
3answers
187 views

Why does my phone automatically power off when there is still 2% battery?

My Moto X Play on Android 6.0 would automatically power off when the battery displays 2% remaining. When I try to turn it back on, I would get a "low battery" symbol, which means my phone didn't ...
2
votes
2answers
406 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. ...
0
votes
1answer
4k views

MOTO E battery drops suddenly to 0%

My moto E phone is not even a month old and already i'm having a HUGE problem with it. I charge my phone to full battery, sometimes during a whole afternoon or night. Then in the morning or at 100% i ...
0
votes
1answer
64 views

Android logcat which app spams logcat

On my Oneplus Two android phone I recently updated to android 6.0. Since then my battery life has decreased drastically. Plugged into my computer I saw that a app is spamming the logcat even when the ...
11
votes
2answers
19k views

How does fast-charge work?

How does Fast Charge work? Does it actually charge your device faster, and if so, Is there a downside to using it?
3
votes
0answers
70 views

Powersave governor VS Marshmallow Doze

After searching on Google and XDA for an answer (which I didn't find), I decided to pose this as a question here. So, I guess that the majority of us know about the so-called big difference between ...