Hi,today I bring you a very useful trick to improve your battery backup and it's very simple.I've tested it in three different xioami redmi note 3 pro (kenzo). The only thing you have to do is to set DPI to 400.For doing that you have to add this line to build.prop: ro.sf.lcd_density=400 reboot and done.I'll also attach a thumbnail   

Enjoy it.