OSTENT 1800mAh 3.6V Lithium Ion Rechargeable Battery Pack Replacement for Sony PSP 1000 PSP-110 Console Voltage: 3.6V, Capacity: 1800mAh Rechargeable and no memory effect. Fits right in the battery slot, and you cover it with the PSP battery cover Compatible model: Sony PSP 1000 (1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1010), PSP Fat Trademark: OSTENT. Quality 3rd party product by OSTENT