More details below
Now there's a better, more environmentally friendly way to power your wireless keyboard, Magic Mouse, Magic Trackpad, or just about anything that requires AA batteries. The Apple Battery Charger kit comes with a sleek, compact charger and six high-performance AA NiMH batteries that are ready to use right out of the box. The reusable batteries are exceptional at holding a charge and last for up to 10 years. Which means you can finally break the cycle of buying and disposing of those single-use alkaline batteries.