How to thrifty smartphone battery
1. Level the brightness of screen to the darkest as much as we can use it comfortably.
2. Turn off vibration, It will preserve battery life.
3. Set the screen saver at 15-30 seconds,the lower setting,the better.
4. Switch off GPS,Bluetooth,3G,4G,Wifi whenever not in use.
5. Close unused applications every times when you stop using.