"After using app. turn off gps and sync to save battery according to usage."
It will take couple of times to work depending on os version.
Its a workaround for the battery drain bug caused by Services / OS / System.
Services are the background tasks on devices that keeps all of the company's services in sync and updated. This covers basic environment, among other services which results in heavy battery drain of your device.
For all the thanx mailers - happy it worked for you !