Magic Battery Mini 4.2.1 -

: Primarily supports Apple peripherals (Magic Mouse, Trackpad, Wireless Keyboard) and select Logitech devices like the MX Anywhere 3 and K380.

: Displays battery info in a small, floating window or via a Notification Center widget rather than cluttering the menu bar. Magic Battery Mini 4.2.1

: Automatically adds or removes devices from the view as they connect or disconnect. Magic Battery Mini 4.2.1

Check if your specific is on the supported list. Help you find free alternatives for battery monitoring. Magic Battery Mini - App Store Magic Battery Mini 4.2.1