If your system runs out of battery very rapidly then avast is the best solution for you.
It is one of the most trusted battery savers that stops applications that you are not
using, will speed up your operating device and will extend your device’s battery life. It
also tells how much time you are left with, on your device’s battery. To know more about
how to extend your Android’s battery life with Avast Battery Saver either visit our site
or contact our customer support.
https://www.avast-support.net/avast-battery-saver/