Amazon.com: Battery Back Door Cover Case for PSP 2000 2001 3000 3001 Playstation Portable Repair Parts Replacement Black : Video Games
If you own a PSP, you might want to uh, make sure your battery isn't expanding – Destructoid
Sony says PSP-3000 battery is the same as PSP-2000, so quit bitchin' | TechCrunch
2-Pack High Capacity Replacement Battery for Sony PSP 2000 3000, Playstation Portable Slim PSP-2000 PSP-2001 PSP-3000 PSP-3001 PSP-3002 Rechargeable Lithium 3.6V 1200mAh 2x Batteries by Insten - Walmart.com
Took a look at my psp 3000's battery, did the original owner upgrade it? Because I remember them being packaged in with a 1200 mAh battery. : r/PSP
For PSP 2000 and 3000 Replacement Battery Pack Rechargeable New 1200mAh 3.6V High Capacity for Sony PSP 3000 and PSP Slim 2000, Include Model PSP-2001, PSP-3000, PSP-3001, PSP-3002, PSP-3004 by Insten - Walmart.com