The original MX Master can be used while its rechargeable battery is charging, but the supplied Micro USB cable provides charging only. Mouse input still travels through Bluetooth or the Unifying receiver, so attaching the cable does not convert it into a wired mouse.

Logitech describes a full charge taking about two hours and 45 minutes. Three side indicators show battery status, with red prompting a recharge and solid green lights marking completion. This separates a power connection from the wireless link needed for normal pointer control.