[Galaxy Note 8.0 (Tablet) Q&A, Help & Troubleshooti] Samavb:
try x note ROM

Hi,

I have N5100 too bought from indiatimes.

Here is what I did to get better battery life out of my note 8.0

1) Go to Settings -> Developer options - > use 2 background processes

2) Do not put Auto brightness, Set the brightness to 20% it will be still be good enough

3) backup and reset - > uncheck everything

4) Google account - > put sync on first in the notification bar and then go to your google accounts and uncheck everything, then disable the "auto sync" from the notification bar

5) Sound - haptic feedback off , vibration , move everything to minimum ..

6) GPS - off , use only when required

7) Developers options - > unknown sources (check only when you need , otherwise uncheck it ) , verify apps - uncheck it

8) Open Google maps, go to settings , uncheck the location services

9) go to youtube app - go to settings - uncheck anything that has syncing options

10) Screen time out 30 seconds

11) Since you said you mentioned that you are using Greenify . I am assuming you are rooted. So you can greenify almost all apps except the launcher and the ones which you use frequently.

12) you can use Rom tool box pro or root cleaner to freeze ( maps , google contact sync, bookmark sync, yahoo finance, hangouts (if you dont use ) , kies , talkback, chrome, google play music , google + , alarm , drm , samsung account , samsung push , samsung print , weather widget, sns, fw upgrade , yahoo news

13) use system control pro app where you can set the governor to pegausq min 200 Mhz, and max 1600 Mhz

14) Go to settings - more settings - Mobile networks - use GSM mode , dont use both WCDMA/GSM

15) Go to google play - > settings - > uncheck auto update apps and also notifications ,,

16) Go to all the google apps and check for any settings that use frequent checking.

17) Use UC browser it is really good for browsing and many options.

18) When charging the Note 8.0 charge it from 0 to 100 in one stretch and dont connect to charger unless it drops below 3%. If it is getting switched off by itself no problem.

19) Go to settings - > Date and Time - > Uncheck everything

20) Go to Settings - > S pen - > Check the option - > Disabling pen detection when pen is attached can extend battery life.

Clear everything in memory in RAM before you leave the note idle.

Before you can do all this. It is better you install the right firmware.

For me XCMH2 gave good battery life. Now X note build. Below is the link to that thread.

http://xdaforums.com/showthread.php?t=2345299

Wipe data , wipe cache , wipe dalvic cache , do it two times in that order.

then you flash the X note build and go through all those steps.

If you do it right I am sure you will not have many wakelocks and you will get better screen on time than 5 hours.

when I did all this the highest I got was 9 hours 26 minutes (7 days).. few months. On an average I was getting 8 and half hours..screen on time with 6 days battery life .. Max standy I got was 15 days battery life with 7 and half screen on .time ..

Your note has to sleep when you are not using. then you can get good standby time and also good screen on time.

) Note 8.0 is really an awesome device. Enjoy!:o