How to increase battery life in android Device!!!!

First of all yo need to root your android device to achieve this...google it for your device to root.

Now install link2sd app...allow root permissions.....

Now freeze at least google play services app & other unwanted apps to reduce the ram usage & save battery also.

Like I freeze these apps & got 2 days battery life with normal usage (1.5-2 hrs calling, 1-2 hrs wifi on, 1-2 hrs mobile data on etc.)
frozen apps - Google play services, Facebook, hangouts, google music, google movies, OTA update, & other mobile specific unwanted apps.
After freezing you can use your phone normally & get the battery life increased. If you need that app to work just unfreeze that...



Note: If you need help for rooting your phone...just leave msg in comments.