About the Apple Battery Charger
Now there’s a better way to power your wireless keyboard, Magic Mouse, Magic Trackpad, or just about anything that requires AA batteries. Included with the Apple Battery Charger are six high-performance AA NiMH batteries that are ready to use right out of the box. They are exceptional at holding a charge and last for up to 10 years, which means you can finally break the cycle of having to buy and dispose of those toxic, single-use alkaline batteries.
When you order the Apple Battery Charger with your Mac, it will arrive with two batteries installed in the Magic Mouse or Magic Trackpad, two batteries installed in the Apple Wireless Keyboard, and two batteries in the box.