Nintendo GAMEBOY ADVANCE Manual page 3

rest them for several hours before playing again.
playing and see a doctor.
AWARNING - Battery Leakage
To avoid battery leakage:
Do not mix alkaline and carbon zinc batteries.
Do not mix different brands of batteries.
Do not use nickel cadmium batteries.
Game Boy, always slide the power switch OFF.
Do not recharge the batteries.
Do not dispose of batteries in a fire.