Amazon.com: Pickle Power PSP 1000 Battery, 1800mAh 3.6V Lithium Ion Battery with PSP Cable for Sony PSP 1000 PSP-110 (1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1010), PSP Fat Console : Video Games
KMD PSP 1000 Fat Rechargeable Battery Pack For Sony PSP 1000 Series
3.6v 1800mah Lithium Rechargeable Battery Pack For Sony Psp 1000 Psp-110 Game Console Replacement Battery + Cable - Rechargeable Batteries - AliExpress
Insten Rechargeable Lithium Battery Pack for Sony PSP 1000 1001 Battery Replacement 3.6V 1800mAh - Walmart.com
Source PSP-1000 PSP1000 PSP-110 PSP110 Battery for Sony PlayStation Gamepad Controller Console on m.alibaba.com
Picked up this chonkers of a PSP 1000 setup: X2 3600mAh battery with its own battery cover. Battery estimates are all over the place. Haven't tested battery life. : r/PSP
Sony PSP-1000, PSP-1001 Replacement PSP Battery GBASP-3LI
Battery Replacement for PSP 1000 – Retro Raven Games
Sony PSP-1000 PSP-1000G1 PSP-1000G1W PSP-1000K PSP Replacement Battery: BatteryClerk.com Game