Apple iMac (21.5-inch and 27-inch, Mid 2010) - Manual (Page 47)

47 Chapter 4 Problem, Meet Solution
Replacing the Batteries
Your Apple Wireless Keyboard and Apple Magic Mouse each come with two
AA batteries installed. You can replace them with alkaline, lithium, or rechargeable
AA batteries.
Keep the battery compartment cover and batteries out of the reach of small children.
WARNING: When you replace the batteries, replace them all at the same time. Don’t
mix old batteries with new batteries or mix battery types (for example, don’t mix
alkaline and lithium batteries). Don’t open or puncture the batteries, install them
backwards, or expose them to fire, high temperatures, or water. Keep batteries out of
the reach of children.
To replace the batteries in the wireless keyboard:
1 Press the power (®) button to turn off your keyboard.
2 Use a coin to remove the battery compartment cover.
Battery compartment cover