The Toshiba Primary High Capacity Battery Pack is a 12-cell, rechargeable, Lithium Ion battery designed to work with various Toshiba series portable computers. Used as either a spare or replacement battery, the high capacity battery pack has twice the number of cells (12 vs. 6) compared to the original battery that came with your notebook, giving you extended battery life for more computing time, watch more movies, play more games or listen to more music. The battery pack attaches to the bottom of the notebook raising the back end by one inch, 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. Features: - Snaps in and out of the battery slot in seconds - Genuine Toshiba quality and reliability - Extend the life of your Toshiba notebook while on the road! - High capacity battery for extended life - Take your office on the road without sacrificing performance, productivity or convenience. - Meets or exceeds the specifications of the original battery that came with the notebook - Get a spare to extend the battery life on the go for lengthy meetings, on campus and flights. - Compatible with Toshiba Satellite A660, A660D, A665, A665D, L630, L635, L640,L645, L645D, L655, L655D, L670, L670D, L675, L675D, M640, M645 series; Satellite Pro L630, L640 and L670 series portable computers - Battery life may vary considerably from specifications depending on product model, configuration, applications, power management settings and features utilized, as well as the natural performance variations produced by the design of individual components. Published battery life numbers are achieved on select models and configurations tested by Toshiba at the time of publication. See "Detailed Specs" for specific battery measurement test. Recharge time varies depending on usage. Battery may not charge while computer is consuming full power. After a period of time, the battery will lose its ability to perform at maximum capacity and will need to be replaced. This is normal for all batteries. - RoHS compliant