Sony PSP Large Capacity External Battery Pack with Cliphook. Extra 3800 mAh capacity
Sony - PSP-PlayStation Portable Battery | Complete Battery Source
Psp-battery-types | Jhonatan Snipes | Flickr
UltraLast Lithium-Ion Battery GBASP-8LI - Best Buy
Amazon.com: OSTENT High Capacity Quality Real 1800mAh 3.6V Lithium Ion Polymer Li-ion Polymer Rechargeable Battery Pack Replacement for Sony PSP 1000 PSP-110 Console : Video Games