Develop Bugs

Data causing High Android OS Usage

Hi, i am suffering from massive battery drain on my gnex, i have noticed that android os uses approx 50% of my battery, which almost making my phone unusable. I have noticed today that when i switch my data off, i dont lose any battery life compared to when i leave it on and the percentage for android os reduces significantly. i am currently using franco's kernal and before that leankernal and suffered the same issue on both, i have also tried opening the camera after reboot which someone suggested but it doesnt work for me, does anyone else have the same issue and is there a fix to the issue as i would like to have data on.
Thank you

Also check data usage and disable background data of app that continues to update. This will also extend battery life.
Sent from my Galaxy Nexus using XDA App

kcharng said:
Also check data usage and disable background data of app that continues to update. This will also extend battery life.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
I have checked the data usage and Android OS is using 775KB of data, so when data is on it must be keeping it awake which uses more battery

using juicedefender may help you it has very good radio controls that will turn off or on your wifi and data connections depending if you device is on or in sleep mode.
Also for your battery is the OS just showing 50% of the battery usage in the bat stats section ? If so that is NOT 50% of your battery that it has used. that simply means that of the percentage of USED battery the OS has used 50% of that. if your battery is at 50% and your OS in bat stats says 50% it has actually used only 25% of your actual battery.
OS is normally near the top of the bat stat list alongside the screen. unless you are playing games.
its normal

Star here:
http://code.google.com/p/android/issues/detail?id=22878
This has been reported to Google.

Goat_For_Sale said:
using juicedefender may help you it has very good radio controls that will turn off or on your wifi and data connections depending if you device is on or in sleep mode.
Also for your battery is the OS just showing 50% of the battery usage in the bat stats section ? If so that is NOT 50% of your battery that it has used. that simply means that of the percentage of USED battery the OS has used 50% of that. if your battery is at 50% and your OS in bat stats says 50% it has actually used only 25% of your actual battery.
OS is normally near the top of the bat stat list alongside the screen. unless you are playing games.
its normal
Click to expand...
Click to collapse
Yesterday i let my gnex battery die and android os almost used 50% with 3% battery remaining, understand where you are coming from, but i have explored the issue further and battery drain is significantly higher when connected to 3g, i will upload a screen shot soon to demonstrate the issue

abz54 said:
Hi, i am suffering from massive battery drain on my gnex, i have noticed that android os uses approx 50% of my battery, which almost making my phone unusable. I have noticed today that when i switch my data off, i dont lose any battery life compared to when i leave it on and the percentage for android os reduces significantly. i am currently using franco's kernal and before that leankernal and suffered the same issue on both, i have also tried opening the camera after reboot which someone suggested but it doesnt work for me, does anyone else have the same issue and is there a fix to the issue as i would like to have data on.
Thank you
Click to expand...
Click to collapse
I faced the same problem, issue was somewhat with auto backup of data, sync of app data & people details in google account,
BUT the main culprit in my case was uTorrent application.
Even though there was no torrent added to it, i didn't even opened it,
it was using 1GB data daily on WiFi and in data usage it was coming under Android OS usage. I uninstalled it, everything went back to normal.
So try to look for such apps which eat up your data in background, it may not be an error of android OS as such.
Hope this helps, Press THANKS if it did help you
Enjoy

Kernel (Android OS) battery usage very high

Hey Zenfoners
Happy with my phone but I have a problem with battery usage.
I'm using GSam Battery Monitor and Kernel (Android OS) under App Usage seems very high.
For example today the phone has used 26% in 5h 45m with 30 minutes of screen on time. Screen usage shows 18%
But App Usage is 56% and 48% of this is Kernel (Android OS). CPU usage for Kernel (Android OS) is 4h 10m. And the phone has only been on for 5h45m.
I can't check what is keeping wake lock because I don't have root.
On idle using wifi it is using 2-3% per hour when my LG G3 and Note 3 use about 1.5% per hour on idle.
Anyone else have this problem?

I'm glad I found your post. Highly frustrating with my zenfone 2. Massive battery drain with google apps and Android OS. Yesterday or it was Google Backup Transport, today it's some other google stuff. Would love to know how to properly debug this stuff. I tried disabling most of pre-loaded Asus stuff but who knows what's causing battery drain. I can lose over 1% of battery PER MINUTE.

I just did a factory reset and added these apps:
GSAM Battery
Dolphin browser
LINE Messenger
Touchpad keyboard
Google Inbox
Google Translate
Google Keep
Android OS is still being crazy. Amazing that you can buy a brand new phone and it fails almost out of the box, and it seems the OS developer is at fault. No wonder people are switching to iPhone!
Sent from my ASUS_Z008D using XDA Free mobile app

So I installed a system update adorable through the menu which seems to be helping now. Android OS still seems the biggest battery drain but at least the drain isn't outrageous like it was before. There's a discussion about the fix on reddit about it:
m.reddit.com/r/zenfone2/comments/334hkc/battery_issue_android_os_eats_a_lot_of_juice_when/
Sent from my ASUS_Z008D using XDA Free mobile app

Were you rooted before? For the 1st "Battery Used by App" screenshot?
I've not been rooted so on the latest s/w update. Haven't seen behaviour like this on any of my recent devices. Terrible battery usage when idle, and all my Google settings (location, backup, etc) are the same.

Well i almost get at 100% of battery status of battery life almost 3 days.
Firmware : 2.15.40.13 Pre-rooted system.img by Shakalaca
Xposed module for ZF2 installed + Greenify (Donate) app
Basically i geenifed all system apps {some you cant greenify) including power saver app which is build in + normall apps.
I will add SS when i will charge battery to 100%.
I cant understand why people gettin device discharging after 6 hours etc.
Follow my guide : http://forum.xda-developers.com/zenfone2/help/how-to-upgrade-cn-version-to-ww-t3101556 to update to the latest WW OTA
Xposed : Here

I'm on the latest WW firmware but I shouldn't have to root, greenify etc. Didn't do it on my Note 3/HTC One/LG G3. What's the point in having 4GB of RAM if you're flushing it every few minutes. I do have location settings and history on, as they were with previous phones, but everything else is very conservative. Zenfone 2 is the only one that shows crazy Android OS usage with same apps and same sync/backup/location etc settings. All on Android 5.0 too!

kazprotos said:
I'm on the latest WW firmware but I shouldn't have to root, greenify etc. Didn't do it on my Note 3/HTC One/LG G3. What's the point in having 4GB of RAM if you're flushing it every few minutes. I do have location settings and history on, as they were with previous phones, but everything else is very conservative. Zenfone 2 is the only one that shows crazy Android OS usage with same apps and same sync/backup/location etc settings. All on Android 5.0 too!
Click to expand...
Click to collapse
How you can compare different phones according to the battery life if they were made in different technology and they using Snapdragons not Intel components.
Thats wrong mate
If you moaning about battery life in ZF2 you should compare it with diff zenfones ( ZF5,ZF6 etc.) or other Intel based devices

Note 3 was an Exynos.
So Intel = still bad then

I haven't rooted or anything. Battery life is now acceptable but Android OS is still near the top, but nothing crazy like it was before the system update. Does your build number match mine? I have the TW phone, so I assume TW software.
Battery graph shows almost continuous usage with screen almost always on.
Sent from my ASUS_Z008D using XDA Free mobile app

psommerfeld said:
I haven't rooted or anything. Battery life is now acceptable but Android OS is still near the top, but nothing crazy like it was before the system update. Does your build number match mine? I have the TW phone, so I assume TW software.
Battery graph shows almost continuous usage with screen almost always on.
Sent from my ASUS_Z008D using XDA Free mobile app
Click to expand...
Click to collapse
Same build number except for ASUS_Z00A (1.8 ghz 4gb RAM) model.

Well ROOT + XPOSED + GREENIFY = 8 Days show battery )
From 23:00 at previous day i left phone with turned on WiFi . Overnight for 9h it drained 4% of the battery so chart is correct.

I fix my battery drain in this way:
Install all OTA updates
Factory Reset.
Reinstall All.
Battery drain seems to be only if you install an OTA without Factory Reset and with all apps already installed.
It take several hours to reinstall all ... but it works !
No more battery drain here !

I done a wipe cache instead of factory reset. You reckon it's the same thing or would I get better results v so th reset? Currently getting 5-6 hours sot with 2.3ghz 4g2g ram. Thanks

aferende said:
I fix my battery drain in this way:
Install all OTA updates
Factory Reset.
Reinstall All.
...
No more battery drain here !
Click to expand...
Click to collapse
I hope you're right!
I did factory reset, install OTA update, and reinstall all. Had one good day. Today, I've lost 6% in about 30 minutes. Even more amusing, the biggest consumer is Wi-Fi ... Which isn't even turned on! Crazy stuff.
I think this'll be the 4th time re-installing stuff now. Good times!
Sent from my ASUS_Z008D using XDA Free mobile app
Sent from my ASUS_Z008D using XDA Free mobile app

I think that dont help, i do that 2 time with out change battery drain. I saw also that deepsleep is very low. Most of the time it rum at 500mhz and need sometimes more then an hour to go to deepsleep.

vivix said:
Well ROOT + XPOSED + GREENIFY = 8 Days show battery )
From 23:00 at previous day i left phone with turned on WiFi . Overnight for 9h it drained 4% of the battery so chart is correct.
Click to expand...
Click to collapse
Well mine last about 15 hours then down. With same setting

Hey there all. If you're still having high android os usage it could be due to calendar storage constantly waking up your phone, check out my post in another thread -> http://forum.xda-developers.com/showpost.php?p=62730039&postcount=21

it is still lolippop 5.0???

[Q] WIFI and android OS Causing battery drain. How to fix?!!?

I have some battery problems with my ASUS phone. It spends so much energy without any reason. I have tried to change OTA ( 2.17.40.12 [no root] and 2.13.40.13 [root] ) a couple of times but still nothing. Even when I try to reset factory settings, I have no results. Another wrong indication is that it shows wifi on, but I have it off. I don't use the device at all, but I see the battery goes down 3% every 10 minutes.
plz help me

Same problem with me. I can't figure out what's causing all the battery drain and the phone heats up a lot. I have used other phones before with all bt, wifi, data on all day I have no issues with them. Only with this phone. I can only get a 4-5 hours usage time. charging takes up to 3 hours?
Anyone can clarify this? I have the Ze551ML Asus_Z00AD version 1.8ghz, 4gb ram, 32gb internal. I don't have the fast charger either

Try going into the WiFi settings to see if WiFi scanning is on. That has been known to drain battery

It's a native 5.0 problem. I'm sure everyone has this problem right now. We just have to wait for an OTA...
Best now, is that you use amplify, Greenify, and servicely to minimize wakelock

aznvi3tric3guy said:
It's a native 5.0 problem. I'm sure everyone has this problem right now. We just have to wait for an OTA...
Best now, is that you use amplify, Greenify, and servicely to minimize wakelock
Click to expand...
Click to collapse
Having "Android OS" as the top consumer isn't a native Lollipop issue. I haven't seen it jump so high on my Nexus 4, which I have left on an older version of 5.0 from last year. When 5.0 was 1st ported to the G2 some kernel changes later fixed Android OS, so I believe Asus can fix a problem that was fixed by non-professionals.
Wi-Fi should also perform better too, looks like Asus' engineers have a lot of work awaiting them. Too bad for them b/c when that ZenPad and selfie release things will get worse.
"I'd Totally Hug You, If That Was Something I Did"

I had battery problems too upon purchasing, then i suddenly thought to cycle the battery, charge it up then let it drain without using it until it turns off and then charge it up until full while turned off. My battery now is much better

Mine was great until the most recent OTA. It installed on 05/31, I don't have the phone with me to see what the build number is, but I am now experiencing the battery drain. Before this OTA I would have 50-60% battery left at the end of the day, last night it died well before then.

Please see our online FAQ for battery power saving skills and other FAQ's:
http://www.asus.com/us/support/FAQ/1009547/
http://www.asus.com/us/support/FAQ/1009601/
http://www.asus.com/us/Phones/ZenFone_2_ZE551ML/HelpDesk_knowledge/
Sincerely
ASUS_USA

Asus_USA said:
Please see our online FAQ for battery power saving skills and other FAQ's:
http://www.asus.com/us/support/FAQ/1009547/
http://www.asus.com/us/support/FAQ/1009601/
http://www.asus.com/us/Phones/ZenFone_2_ZE551ML/HelpDesk_knowledge/
Sincerely
ASUS_USA
Click to expand...
Click to collapse
I want asus support unlock bootloader
Tks

I tried to clear my cache hoping it would help with the battery drain. I wasn't patient and thought the phone froze while clearing the cache and restarted it. I've now read that it can take 10 minutes to clear. When it restarted it was the flashing dead android. I was able to fastboot erase cache (took a couple of seconds) and It was good to go. I went ahead and did a factory reset. My NFC didn't seem to be working, so I wanted to see if that would fix it. It may still not be working. My phone now has much better battery life. It has been downloading and installing apps for three hours now (slow internet loading ~65 apps), and I have been setting up my home screen. It is at 90%. Doing much better, like it was before.
I'm on Z00A-2.17.40.12_2050515
Tl;dr: a complete wipe helped with my battery after the most recent OTA.

Asus_USA said:
Please see our online FAQ for battery power saving skills and other FAQ's:
http://www.asus.com/us/support/FAQ/1009547/
http://www.asus.com/us/support/FAQ/1009601/
http://www.asus.com/us/Phones/ZenFone_2_ZE551ML/HelpDesk_knowledge/
Sincerely
ASUS_USA
Click to expand...
Click to collapse
Hello my friends and thank for any help for you.
First look my photos. My problem is bug asus and lollipop. Don't kill to this program.
Tried everything. Root no root. Firmware update new and old. Kernel update. Killed application. Battery application. Recovery. Delete cache. Everything and nothing nothing nothing.
Don't Pay 300 € to buy znf
To have black screen background, full killed app. Cleaner app. Battery apps. Full economy mode. Close all time WiFi and 3g etc etc
Please working to find solution. Many user have this problem. Look forum asus.
Asus don't give up
Respect your customers

Asus_USA said:
Please see our online FAQ for battery power saving skills and other FAQ's:
http://www.asus.com/us/support/FAQ/1009547/
http://www.asus.com/us/support/FAQ/1009601/
http://www.asus.com/us/Phones/ZenFone_2_ZE551ML/HelpDesk_knowledge/
Sincerely
ASUS_USA
Click to expand...
Click to collapse
My battery lasts four hours without even using the phone. We shouldn't have to jump through hoops to get something that is even usable. THIS is ridiculous.

alex.o said:
I tried to clear my cache hoping it would help with the battery drain. I wasn't patient and thought the phone froze while clearing the cache and restarted it. I've now read that it can take 10 minutes to clear. When it restarted it was the flashing dead android. I was able to fastboot erase cache (took a couple of seconds) and It was good to go. I went ahead and did a factory reset. My NFC didn't seem to be working, so I wanted to see if that would fix it. It may still not be working. My phone now has much better battery life. It has been downloading and installing apps for three hours now (slow internet loading ~65 apps), and I have been setting up my home screen. It is at 90%. Doing much better, like it was before.
I'm on Z00A-2.17.40.12_2050515
Tl;dr: a complete wipe helped with my battery after the most recent OTA.
Click to expand...
Click to collapse
did the factory reset restore all the bloatware for you? i want to try it but i don't want that bloatware to come back

The bloatware was back, but the battery performance is better. I removed the bloatware I could again. I haven't rooted the phone.

alex.o said:
The bloatware was back, but the battery performance is better. I removed the bloatware I could again. I haven't rooted the phone.
Click to expand...
Click to collapse
So non-root performs better?

I don't think so. My wife also now has a Zenfone 2. Same model as mine, the 4gb ram 64gb model, also has the most recent OTA. Hers is non-rooted as well and has the battery drain, but only if the wifi is on. We tried a factory reset and clearing the cache. It didn't help.

Ace42 said:
Having "Android OS" as the top consumer isn't a native Lollipop issue. I haven't seen it jump so high on my Nexus 4, which I have left on an older version of 5.0 from last year. When 5.0 was 1st ported to the G2 some kernel changes later fixed Android OS, so I believe Asus can fix a problem that was fixed by non-professionals.
Wi-Fi should also perform better too, looks like Asus' engineers have a lot of work awaiting them. Too bad for them b/c when that ZenPad and selfie release things will get worse.
"I'd Totally Hug You, If That Was Something I Did"
Click to expand...
Click to collapse
Actually, it is. It has to do with play services. Good for your nexus 4 but read up on the forums. It's an android issue. Every ROM I've used for my HTC one has it, gpe, aosp, sense.

Had a nexus 5 and It sounds like that native 5.0 lolly pop issue, where it as constantly scanning for 5HZ Frequency, you could try and lock it in to 2.4GHZ setting under WiFi advanced. See if that helps.

Root the phone and delete the crap with titanium backup. I did this on the latetest update and battery is better then my Samsung s5. Turn screen from auto to quarter of the way. I have WiFi and my data is with wind mobile in Canada so it is always looking for signal. Take a look at battery from today. Been off charger since 5am til 10pm.
Asus zenfone 2 1.83 2gb with 16gb sd card

Battery pics

[Q] Why Battery Draining Fast?

I have owned this phone for about 3 days, but I have some battery issues.
I attached 3 pictures, and on the first picture, you can see there appears to be no wakelocks, but on the 2nd picture, the Android OS used the vast majority of my battery life, and the 3rd picture, Android System has a lot of "Wake Up Device" (i don't know what the number means is it minutes?)..
I have uninstalled/disabled most of the apps I don't need, and have the brightness set to low, and on airplane mode with all sync off, and zenmotion turned off, and this still happens. I lost about 11% battery overnight with this problem. It seems like when I am using the device, the battery drops a percent every minute even when I am just scrolling through the Settings.
I only used about 1 hour screentime on this phone and the rest on idle.
I already installed both system updates.
Does anyone know why this happens? I know there is a memory leak problem, but I saw on another thread other people don't have that bad of a drain anymore...

VietnamTom said:
I have owned this phone for about 3 days, but I have some battery issues.
I attached 3 pictures, and on the first picture, you can see there appears to be no wakelocks, but on the 2nd picture, the Android OS used the vast majority of my battery life, and the 3rd picture, Android System has a lot of "Wake Up Device" (i don't know what the number means is it minutes?)..
I have uninstalled/disabled most of the apps I don't need, and have the brightness set to low, and on airplane mode with all sync off, and zenmotion turned off, and this still happens. I lost about 11% battery overnight with this problem. It seems like when I am using the device, the battery drops a percent every minute even when I am just scrolling through the Settings.
I only used about 1 hour screentime on this phone and the rest on idle.
I already installed both system updates.
Does anyone know why this happens? I know there is a memory leak problem, but I saw on another thread other people don't have that bad of a drain anymore...
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=3122883

For battery draining assistance see ZenUI app called ASUS Support: Apps/ASUS Support/Assistance/Battery/Battery drains fast/follow detailed troubleshooting steps. If battery still draining, recommend updating to latest firmware version and then performing a factory data reset. Please ensure to back up all important data as this will erase all data.
Sincerely
ASUS_USA

Mine seemed fine for a week and then I got this today. Pretty much done with it. Can't even get it to factory reset.

Asus_USA said:
For battery draining assistance see ZenUI app called ASUS Support: Apps/ASUS Support/Assistance/Battery/Battery drains fast/follow detailed troubleshooting steps. If battery still draining, recommend updating to latest firmware version and then performing a factory data reset. Please ensure to back up all important data as this will erase all data.
Sincerely
ASUS_USA
Click to expand...
Click to collapse
Keep it simple, use a dumb phone?
Posted using my phone.

Umm do I have good battery?
Sent from my ASUS_Z008D using XDA Free mobile app

Asus_USA said:
For battery draining assistance see ZenUI app called ASUS Support: Apps/ASUS Support/Assistance/Battery/Battery drains fast/follow detailed troubleshooting steps. If battery still draining, recommend updating to latest firmware version and then performing a factory data reset. Please ensure to back up all important data as this will erase all data.
Sincerely
ASUS_USA
Click to expand...
Click to collapse
Create update to resolve the problem .
And respected customers. We do what you suggest.
Enough!!!!!!!!! The Problem is lollipop and asus software.
Find solutions, I don't tell @€&@'@#

Its most likely anddriod memory leak which is fized on 5.1

I have zenfone 2 and at the 1st week the battery drained very fast but then after I Updated all the aps of Zen Ui i noticed improvements to my battety life. go to settings and go to zen ui instnt update and update all the apps. now im using my zenfone 2 whole day surfing from 9am to 7pm and i still have 30% battery hope it works for you too. try it

hello guys i am getting screen on time of mere 2 hours without any significant use on my ZF 2.... i have stock rom. no root nothing.... can anybody help me

Battery drain issue still not fixed with updates???

Disable PC Link and Party Link default apps, worked for me. They're default apps using cpu all the time like they're SO Android... Disable all default apps that you don't use too

I've got here two brand new models, which differ only for touch and battery version (Z2C3 01040005 1525 and ... 1526)
The 1526 doesn't show any drain. The 1525 does, as of its very first boot. I tried keeping same settings of course.
I'd like to point out that when connected and charging it shows big steps like going from 63 to 72% and it also reaches 100% in less than 60 mins.
When disconnected the discharge path exhibits about 1:15min of operation.
May I suspect the battery is defective?
PS: after a factory reset from recovery seems have fixed the problem for now at least...

Asus Zen phone 2 laser battery drain ?
I made an account with this website and took the time to write this, so I can let users who own this phone know one of the
biggest battery drain features I've found......DISABLE HOMESCREEN APP MOVEMENT SENSOR, in app icon settings.
When you tilt your phone app icon adjust to the tilt, yes looks cool until you realize how much battery you could save by leaving then static and not constantly running a fDucking tilt sensor.

hello，my zenfone ze551ml might be going to upgrade to mm 6.0， please tell me is it marshmallow stock rom camera better than 5.0？ is it 6.0 have setting sd card become internal storage？ is it 6.0 have mass big storage not just mtp when connected to pc ？
Sent from my S660 using XDA Premium 4 mobile app

Battery Fast Drain

Hello,I am using Zenfone 2 16GB, 4GB ram . My battery life is bad every 3 minute %1 drain fastly ...
I can see screen time maximum 4 hour or maybe a little more for 4 hour.Screen Light %0 wifi is closed and everything is closed no working program no working bluetooth or nfc etc..I tried everthing for better battery life but ı cant solve this problem ı bought my phone one mounth ago and ı see everyday android is is using %45-50 battery.I never opened auto screen lighter or 4g or ntc. But drain,fastly every 3 minute %1 drain.my firmware is 2.20.40.58 and how can solve this problem can you help me please

To help improve battery life
1. Please ensure to turn off 'Wifi Scanning always available.'
2. Please also see the following information showing 8 ways to extend the ZenFone 2 battery Life. http://www.asus.com/us/support/FAQ/1012981/
3. If still no improvement then recommend performing a hardware reset including cache wipe partition and try steps 1 & 3 again. http://www.asus.com/us/support/FAQ/1011956/
Sincerely,
ASUS_USA
[email protected]

None of those ASUS official 8 ways do solve the root cause of the battery drain issue.
So far I find most interesting way that may really double your battery life is to activate the "Intel Deep Sleep Mode"
Please check at the link (sorry too new to post a link)
-quote Post on 2015/8/11 01:16 | View KLChi's posts -
Hi
I still dare to activate my Zenfone2 deep sleep mode following the process.
Guess what happened? I have no problem with my proximity sensor nor any issue with ZenMotion after 1 week tests.
And the battery saving effect of this deep sleep mode is working like a champ.
I have not yet calculated scientifically but the deep sleep mode at least *doubled* my battery life, which means before activating deep sleep mode I need to recharge every day of even 1/2 day. Now my Zenfone2 could work without charging for more than 1 day or even 2 days under normal use.
Now I have removed all apps related to battery saving like amplify, greenify, battery doctors, etc.
and I don't even need to close any app in startup management and the deep sleep still works and extend my battery life up to 2 days recharging cycle under my normal usage.
Although I find a side(not bad) effect so far is that the file transfer will be "deep slept" (i.e. backup progress stopped at the % where your screen turns off) and it seems the moving activity in the background is deactivated when screen off. But this is not a issue to me as I expect all apps and activities that out of my focus should not keep draining my battery. I can achieve this by stopping unkown/unecessary wakelocks through "xplosed + amplify" but I don't need them anymore as deep sleep mode seems does the same for me.
One thing really does matter to me is that will all notification still works? My test so far shows that by activating the deep sleep mode will not disable any wifi nor 4G signal nor any notification that the apps should normally give you alarms/warnings, especially wake up alarms.
I'd like to really really thank you for your advise.
I think this "intel deep sleep mode" is really a total soultion to the Zenfone 2 battery drain issue and worth a try, at least for me so far.
I don't know if this process also may apply to non-intel cpu android phones which also have the andorid os battery draining bugs.
--

can you tell me the steps to enable deep spleep mode?

I am a noob bro :angel: but the following tweaks will certainly help u.
I use auto start manager to manage almost all except a few apps like whatsapp and truecaller etc.
Disable wifi scanning and wifi network notification in wifi advanced settings. Our phone's brightness is too much even on the lowest setting so keep it around 25-30% for lower battery drain from display.
Watch out for wakelocks, read the battery graph. I prevented truecaller and playstore from waking up device.
Turn off gps when not using.
Disable asus built in bloatware and certain google apps that u don't use e.g. i dont use google plus, talkback, hangouts and even chrome since these run in background and drain battery.
Google app is also a big culprit. I personally don't use google app and disabling it will make a big difference.
Then use data usage in mobile manager for further tweaks. Avoid 4g/3g when idle.
Mine is a 2gb z00a and i get a decent backup of around 1.5 days with normal usage with calling whatsapp browsing. Intel processor is a battery vamp and this fact can't be changed.
And not to forget after every ota update perform a cache wipe to get rid of conflicting data from previous firmware.
And this intel deep sleep mode is new to me..will also try it.

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