It’s unfortunate that the most recent iteration of the Magic Mouse has its Lightning charging port on the bottom, making it impossible to use while charging, unlike the Magic Keyboard and Magic Trackpad, which work fine when plugged in. To check if your Magic Mouse needs charging before it starts to nag (and starts acting a little funky), look in one of these spots. If your menu bar is displaying the Bluetooth icon, click it, and the charge level should show up. Or click the Control Center icon on the menu bar and click Bluetooth. You can also look in System Preferences, in either the Bluetooth preference pane or the Mouse preference pane. In our experience, the Bluetooth menu is the easiest, but Control Center and the Mouse preference pane are the most reliable—sometimes the charge level doesn’t appear in the menu.