Using Amstron PCGA-BP2V replacement battery as a spare you will never worry about running out. With a capacity of 4400mAh, this standard capacity battery will work seamlessly when you are on the move. The LSO-24 is precision-engineered and rigorously tested to be 100% compatible with the Sony Vaio PCG-V505, PCG-Z1, PCG-BP90 or other Vaio series of Sony notebooks. Take your work on the road with you without sacrificing performance and productivity with Amstron brand Sony laptop batteries. • Chemistry: Li-Ion • Rating: 11.1V 4400mAh • Will meet or exceed original specifications • Warranty: 1 Year