Amazon.com: EEMB 10PACK Tabbed CR1616 Battery with Solder Tabs 3V Lithium Batteries for Gameboy Cartridge Battery Ruby Gameboy Advance SP Fire Red Leaf Green Emerald, 1616 Battery GBA Gameboy Advance Cart Save :
Amazon.com: Panasonic 3X CR-2016/F2N 3V Lithium Coin Battery SMD (SMT) Tab for PC CMOS CHECKSUM Failure Battery State Low, System Options NOT Set, TIME Date NOT Set Display Type Mismatch, Memory Size