A free, lightweight and very simple application that will let you know the current battery level and how much time you have left.

When the application is installed and opened, it will display information about the battery level and how much time is left. You can also get information about the battery's health. 

The information is displayed in a simple, easy-to-read format and the app allows you to get an estimate of how much time is left and how much power the battery has left. The application is useful to know when you need to charge or not. It also provides useful tips to help you change your charging habits and save battery power.