No matter what Android device you have, we all face the same problem, our battery dies. Smart battery saver by Bitdefender promises to helps save your precious batter life.

Download Bitdefender's Smart Battery Saver! It's a 100% FREE Android app that understands your smartphone's usage trends, and adapts your device's settings to maximize battery performance! It features predefined profiles and allows you to create your own custom ones, to squeeze every second of battery life of your device. Also, Bitdefender Smart Battery Saver allows you minimize your Android's battery drain without having to disable the functions you use the most!

Source: Google Play Link