This is a Brand New Li-Ion Original Battery for Toshiba. Toshiba Part Numbers: PA3400U-1BRS, PA3400U. Compatible Toshiba Models: Toshiba Satellite A100: A100-S8111TD with Intel Core Solo or Core Duo Processor only, A100-ST8211, A105-S4xxx. Toshiba Satellite M100 Series: M100-ST5xxx, M105-S322, M105-S30xx, M110-ST1161, M115-S3xxx. Toshiba Satellite M Series: M40, M45 (except M45-S165, M45-S165X...