Satisfaction Ensured 4400mAh Laptop Replacement Battery for Sony VGN-AX570G VGN-AX580G (VGP-BPS4 VGP-BPS4A)! May be your existing battery is getting tired and worn out. Get a spare / replacement Sony VGP-BPS4 Battery to extend the battery life dramatically on the go for lengthy meetings and flights. Part Number:VGP-BPS4 VGP-BPS4AFit Model:Sony VGN-AX Series: Sony VGN-AX570G, Sony VGN-AX580GSony VGN-BX Series: Sony VGN-BX90PS, Sony VGN-BX90PS1, Sony VGN-BX90PS2, Sony VGN-BX90PS3, Sony VGN-BX90PS4, Sony VGN-BX90PS5, Sony VGN-BX90PS6, Sony VGN-BX90PS7, Sony VGN-BX90PS8, Sony VGN-BX90S, Sony VGN-BX143C, Sony VGN-BX143CP, Sony VGN-BX145CP, Sony VGN-BX148CP, Sony VGN-BX165CP, Sony VGN-BX168GP, Sony VGN-BX178CP, Sony VGN-BX194VP, Sony VGN-BX195EP, Sony VGN-BX195SP, Sony VGN-BX195VP, Sony VGN-BX196SP, Sony VGN-BX196VP, Sony VGN-BX197XP, Sony VGN-BX294VP, Sony VGN-BX295SP, Sony VGN-BX295VP, Sony VGN-BX296VP, Sony VGN-BX296XP, Sony VGN-BX297XP, Sony VGN-BX345CN, Sony VGN-BX348CN, Sony VGN-BX540B, Sony VGN-BX541B, Sony VGN-BX543B, Sony VGN-BX546B, Sony VGN-BX563B, Sony VGN-BX565B, Sony VGN-BX567BDescription:Using advanced cell technology and quality parts, this Sony VGP-BPS4A Battery guarantees the stamina you need for long work sessions and travelManufactured to the highest quality available, Sony VGN-AX570G Battery with true enhanced performanceBattery type: Li-ionRatings of this Sony VGN-AX580G Battery: 4400mAh, 11.1VPowered by High Quality CellsPackage Includes: One Sony VGP-BPS4 Battery for the Listed Models and an instruction manualThis is a non-OEM generic productColor: BlackDimension: 20.6 x 5 x 1.9cm (Approx.)Weight: 371gWarranty:Full 1 year warranty100% Q.C. of EVERY Battery