Battery drain with Android os

[demonntl]

Hi,

after some update, my Zenfone 2 eat a lot of battery.
The android os is taking 4% per hour, without using any thing, wifi off, 3g off. Can you advise?

 

[Rukbat]

Android OS is using only 3% of the total amount used? I want my phone to do that, I'd even be happy if it used 10%. 15 hours to 40% (or approximately)? That's something some people would kill for.

(That's not 3% per hour, that's 3% of the total amount being used by the entire phone since the last charge. It's usually between 15% and 30%, depending on the phone. Most people are happy to get 8 hours on a charge.)

 

[demonntl]

Android OS is using only 3% of the total amount used? I want my phone to do that, I'd even be happy if it used 10%. 15 hours to 40% (or approximately)? That's something some people would kill for.

(That's not 3% per hour, that's 3% of the total amount being used by the entire phone since the last charge. It's usually between 15% and 30%, depending on the phone. Most people are happy to get 8 hours on a charge.)

Hi Rukbat,
I charged to 100%, just turn on my phone for 1h20min, did nothing, and the OS consume 3%. Only standby cost you 3% per hour. the phone will not last for 1 working day.

 

[movielover76]

This is a 5.0 lollipop issue, it won't be fixed until we get 5.1
I've been able mitigate it by never using WiFi , using the auto start manager, and turning off or down any nonessential syncing apps

 

[gtt1]

I am not much of a user and have no battery problems, seldom getting to 50-60% by the time I plug in at night.

I go to the gym in the a.m. listen to google play music by wifi and about 40 minutes when I am finished battery is usually 93-96% still. I turn of all apps at end of use and use Asus app that doesn't let them auto start. Few phone calls most is using chrome or my camera, checking Instagram and my Investment app.

 

[B. Diddy]

Android OS battery drain has been a persistent issue on this phone. On my Zenfone 2, OS always ends up using 30-40% battery by the end of charge, and the phone usually loses 2-3% per hour when idle.

I don't think this is a Lollipop problem, because this never occurred on my Nexus 5. I think it has to do with the Intel Atom processor, because if you ever look at the core usage, you'll see that none of the cores ever seem to go idle. Even when the phone is idle, all 4 cores are working, usually at 500 Mhz. This doesn't happen with the Snapdragon on the Nexus 5. I'm guessing that this leads to the kind of drain we experience.

Posted via the Android Central App

 

[mstrblueskys]

Had anyone else noticed it's worse with the most recent upgrade? I've been struggling all weekend.

I'll do the phone reboot a few times tonight and see if that's my issue.

Posted via the Android Central App

 

[TC93]

Android OS battery drain has been a persistent issue on this phone. On my Zenfone 2, OS always ends up using 30-40% battery by the end of charge, and the phone usually loses 2-3% per hour when idle.

I don't think this is a Lollipop problem, because this never occurred on my Nexus 5. I think it has to do with the Intel Atom processor, because if you ever look at the core usage, you'll see that none of the cores ever seem to go idle. Even when the phone is idle, all 4 cores are working, usually at 500 Mhz. This doesn't happen with the Snapdragon on the Nexus 5. I'm guessing that this leads to the kind of drain we experience.

Posted via the Android Central App

I just recently got this phone but noticed similar results as you. My Zenfone 2 (2gb ram, 16gb memory) is losing 2% per hour doing nothing with syncing turned off and even putting it on the lowest power setting. My LG G2 only loses 0.3% to maybe 0.5% per hour doing nothing.

Mine also has all 4 cores running at 500mhz, never going lower or stopping. My LG G2 phone has 4 cores also, but it will have 1 core active at 300mhz and the other 3 cores shut down like it should be.

I do have the latest update installed on the Zenfone 2.

 

[B. Diddy]

This might be the reason why ASUS changed from the Atom to the Snapdragon in the subsequent Zenfone 2 models.

 

[mstrblueskys]

This might be the reason why ASUS changed from the Atom to the Snapdragon in the subsequent Zenfone 2 models.

Then I come back to whether or not it's Asus, Google, or Intel. I know my Atom Windows machines are battery champions. And one of those is an Asus. Perhaps Intel and Google need to become better friends?

Does anyone in here have the Asus Zenpad S 8? I'll hop over to their forum and see if they are experiencing this.

Update: They don't have the issue, or at least it's not noticeable compared to the performance of other tabs - I wonder if it's the radios on the Intel chip? That's one of the only differences.

 

[Albert Tan888]

Asus is really gonna have a hard time matching battery time and sot with arm based soc. Maybe by software optimization they can squeeze a Lil more juice to it but don't expect a big bump. Intel uses quad core 2.3ghz, so meaning all runs at 2.3ghz most of the time and the latest fw update throttle down the balance mode to 1.8 ghz. Unlike arm based soc uses big. Little architecture where 4 cores are equaled to 2 higher clock cores and 2 lower clock cores which gives it better battery performance which Intel does not have. All four cores will have the same frequency whether full or throttle down unlike big. Little it can adjust the 2x2 cores freely.

Posted via the Android Central App

 

[likwidoxigen]

You may have the same "calendar storage" wakeup issue that I had. I was somewhere between 400 and 500 wakeups from calendar storage a day but I finally fixed it.

f you can install wakelock detector and see crazy wake up calls for "calendar storage" there are a two things you need to do. I tired them individually but it did not work.
First thing I did was do a "sync now" in Business Calendar 2. This is where I got a pop up window for Asus trying to connect to my FB calendar which had never happened before (this was with calendar sync for facebook disabled btw). I granted permissions then I went into "Asus Cover" and turned that off.
Then REBOOT and enjoy!
My best bet is that calendar sync kept failing for asus cover because it was trying to get the fb calendar but was getting blocked. The asus cover (despite the fact that I don't have an asus cover) must have been constantly polling trying to get calendar events to show compounding the issue.