Battery Info is a free Android application developed by APM that provides a brief overview of your battery status in a small window. The app comes with a 3-icon widget that displays the battery level, temperature, and voltage. The widget is customizable, allowing you to change the colors and size to your liking.

One thing to note is that if you use any task manager or clear the RAM, the widget may stop working for 2-5 minutes, but it will automatically start working again. Additionally, every time you charge your phone, you need to open the app to reset the "Time since last charge" when the battery level is equal to or greater than 90%. If the battery level is less than 90%, the time will not reset.

Overall, Battery Info is a simple yet useful tool for monitoring your battery status, especially for those who need to keep an eye on their battery usage throughout the day.