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. :
Genuine Nintendo Gameboy Advance SP Battery Pack Li-ion AGS-003 OEM - Lot of 5 | eBay
Nintendo Game Boy Advance SP Battery Replacement - iFixit Repair Guide
Another Nintendo Console Has Gotten An Upgrade, But It's From 18 Years Ago - Nintendo Life
Game Boy Advance SP - Battery Pack for Gameboy Advance | Gamers Paradise
Travel Charger Compatible With Gba Sp / Nintendo Ds : Target
Gameboy Advance SP Powerful Battery Kit
Nintendo Game Boy Advance SP Shell Replacement - iFixit Repair Guide
Nintendo - GameBoy Advance SP Battery Replacement
I found an awesome battery for the SP : r/Gameboy
Portable Emergency AA Battery Charger Extender suitable for the Nintendo Gameboy Advanced SP / GBA SP - with Gomadic Brand TipExchange Technology - Walmart.com
2pcs 850mAh Rechargeable Lithium ion Battery pack + Tool for Nintendo Game boy Advance For GBA SP|Batteries| - AliExpress
How to Play on a Game Boy Advance SP (with Pictures) - wikiHow
Restoring a Game Boy Advance SP - new housing, battery and front light | Igor Kromin
Restoring a Game Boy Advance SP - new housing, battery and front light | Igor Kromin
Gameboy Advance SP battery and USB charger set, Video Gaming, Gaming Accessories, Cables & Chargers on Carousell
Nintendo Game Boy Advance SP Battery Replacement - iFixit Repair Guide
I Can't Believe This Game Boy Advance SP Still Works
Best Game Boy Advance SP Battery Replacement - Nerd Techy
New Battery Pack Replacement for Game Boy Advance SP
Game Boy Advance SP System Red w/Charger For Sale Nintendo | DKOldies