This is a Brand New Li-Ion Original Battery for Toshiba. Toshiba Part Numbers:PA3399U, PA3400U-1BRS, PA3399U-1BAS, PA3399U-2BRS. Compatible Toshiba Models: Satellite A100: Satellite A100-S8111TD, A100-ST8211. Satellite A105: Satellite A105-S4102, A105-S4104, A105-S4132, A105-S4134, A105-S4334, A105-S4284, A105-S4397. Satellite M100: Satellite M100-ST511. Satellite M105:Satellite M105-S3001...