Check the end of your Ryobi 4V battery — if it has a button, then all you need to do is press it. The LED that is integrated into the battery will then either light up red, orange, or green.

Learn how to check the Xbox Controller Battery on PC. When your Xbox Controller is plugged in via USB, you will also see a plug over the battery icon.

Learn how to check your Android phone's exact battery health percentage and Charge Cycle Count. Step-by-step instructions, ...