With this application Battery life - Checker Pro you can show your battery percent in a clear elegant display.

With advanced functionality you can display your battery charge any time you have left temperature health voltage and time since plugged / unplugged and also boosts your battery life by tracking how apps use your battery .
Battery life - Checker Pro is a free battery saver software that is specifically designed to optimize the battery life of your Android device and saving battery with just one click by tracking how apps use your phone charger .

You can configure your own battery saving plan by clicking "Check usage "

★ - Features - ★

★ CPU/Processor usage chart
★ battery info and percent
★ Configure device consuming settings
★ Check battery usage and battery temperature
★ Notifies you of critical battery performance
★ easy battery saver

Give it a try .. it's free and open source!
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Tag words:

battery app
battery info
charging
longer battery life
save battery
optimization
charging
percent