Best Game Boy Advance SP Battery Replacement - Nerd Techy
Rigged an external GameBoy Advance SP battery charger when working on a junk GBA SP that wouldn't charge, using a camera battery charger of the same specs I wasn't using anymore. :
Battery for Nintendo Game Boy Advance SP | Helder Game Tech – ZedLabz
Nintendo Game Boy Advance SP Battery Replacement - iFixit Repair Guide
Nintendo Advance SP AGS-001 GBA SP Replacement Battery: BatteryClerk.com Game