2 X Battery Compatible With Sony Psp Slim & Lite (psp-2000 / Psp-2004) / Psp Brite (psp-3000 / Psp-3004) Psp-s110 3600 Mah - Video Game Consoles - AliExpress
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
Rechargeable Battery Pack for Sony PSP 1000® Model - XYAB
Sony PSP 3000 Sky Blue Marine Blue Console Only 3600 mAh Batt NTSC-J 0342 | eBay
PSP with a real 3600mah battery it's huge but the battery life is amazing also takes almost twice as long to charge. : r/PSP
Replacement 3.6V 3600 MAh Battery + 5V AC Adapter Charger for Sony PSP 2000, 3000 slim version - Walmart.com