Battery voltage: 3.6V, capacity: 1200mAh. Dimension: L=5.6cm (2.20 inch), W=3.5cm (1.38 inch), H=0.9cm (0.35 inch) Rechargeable and no memory effect, can be recharged up to 1500 times when fully or partially drained. Upgraded version, high capacity quality lithium ion battery pack. Compatible model: Sony PSP 2000 (2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010), PSP 3000 (3001, 3002, 3003, 3004, 3005, 3006, 3007, 3008, 3010), PSP Lite, PSP Slim ( Not compatible with Sony PSP Model 1000). Fits right in the battery slot, and you cover it with the PSP battery cover. Trademark: OSTENT. Quality 3rd party product by OSTENT.