Extend Battery life of your android device.

Follow these simple steps to increase “Battery Life”:

1. Disable Animation effects: If you want long battery life then you have to disable animation effect. Follow these steps to disable animation effect.
   1. Open Settings> About> Software Information> More.
   2. Then tap “Build number” seven times to enable Developer options. …
   3. Go back to Settings menu and now you’ll be able to see “Developer options” there.
   4. Tap on “Developer options” and scroll down, You will find “Drawing” section.
   5. Read carefully and find “windows animation scale” tap on it and select ‘animation off ‘ option.
   6. Then tap on “Transition animation scale” tap on it and select ‘animation off ‘ option.
   7. Tap “Animation duration scale” tap on it and select ‘animation off ‘ option. And its done.

   NOTE: You have to be careful during these steps, do not check any other option except above mention menu option.

2. Use static wallpaper: Try to avoid setting live wallpaper.  AMOLED screen (like most Samsung devices), use a dark-colored background. Black wallpaper can save your battery because AMOLED screens only illuminate the colored pixels. Black pixels are unlit, so the more black pixels you have, or the more darker pixels, the less battery you need to light them up.
3. Do not use adaptive/auto brightness: It may sound good, but auto-brightness is usually way brighter than you really need. It’s much better to manually set a super low brightness level that is still comfortable, and then just bump it up when necessary. This is one of the main ways to improve your battery life as the screen is one of the biggest battery suckers.          
4. Turn off vibration: Switch off  vibrate option. Unless you really need that added awareness, turn off vibration alerts for incoming calls. It actually takes more power to vibrate your phone than it does to ring it. Turn off hap tic feedback too (that buzz you get from typing on the keyboard). Sure it feels cool, but it doesn’t really add anything to your experience, and it’s another battery drainer. 
5. Use a smart app manager: It’s a good habit to use an app manager that can manage running apps in your device. Run it regularly to kill those apps who are running unnecessarily in  background.                                                                                  
6. You don’t need to be connected 24/7:  Disable internet connection when not needed, whether it is mobile data or wi-fi.        
7. Explore the battery saving features on your phone: All ROMs, whether it’s stock Android, OEM UI’s like TouchWiz or custom ROMs like CyanogenMod, have various settings in the menu to help conserve or optimize battery consumption here and there. HTC has Extreme Power Saving Mode, Samsung has Ultra Power Saving Mode, Sony has STAMINA mode and so on. Find these various options for your device and ROM and make them work for you.                                                                   
8. Turn off auto sync setting: Turn off auto-syncing for Google accounts. If you don’t need every single Google account updated every fifteen minutes, just go into your Settings and Google account and turn off auto-sync for those apps you don’t need constantly updated.Some apps – like email – let you manually refresh when you launch them, rather than multiple times throughout the day when you may not need them to. The same goes for Twitter, reddit and co. Unless you need constant updates or push notifications (like for Facebook or your calendar) just sync when you actually use the app.