How To Open Apple Mouse Battery Compartment. Remove the battery compartment cover located on the bottom side of the keyboard then remove the old batteries. This is done by sliding the small circular button at the back of the mouse.
Remove the door to get to the battery. The Apple Wireless Keyboard Aluminum uses three AA batteries. To help save battery turn the power switch on the bottom off when youre not using your mouse.
Follow these instructions on how to change batteries on an Apple Magic Mouse.
Replace the battery compartment cover. One of the AA batteries in my keyboard is stuck inside due to corrosion. When the catch is pulled down the plate will come away. You only need to open the compartment and slide the batteries in making sure that the positive ends of the batteries are positioned in the right direction.
