The Toshiba Primary Extended Capacity Battery Pack is a 9-cell, rechargeable, Lithium Ion battery designed to work with Toshiba Satellite A200 and A205 series portable computers. Used as either a spare or replacement battery, the extended capacity battery pack gives you extended battery life for more computing time, watching more movies, playing more games or listening to more music. The battery pack attaches to the bottom of the notebook raising the back end by 1-1/2 inches, giving you a comfortable angled typing surface.Take your office on the road without sacrificing performance, productivity or convenience with Toshiba Notebook battery packs. Battery power gives you the ability to use your computer around the house, on campus, in the office, and when you travel either on business trips or vacation. Enhanced battery life helps you stay connected and be productive wherever your work takes you. This battery pack meets or exceeds the specifications of the original battery that came with your notebook. It interfaces with the Toshiba Power Saver Utility on the notebook, which features a charge indicator to help you monitor, the available power.