Toshiba PA3084U-1BAS replacement laptop battery by Amstron is made from the highest quality cells and parts. Amstron provides reliable, high performance replacement batteries for your Toshiba laptops. The LTO-35 is designed to be 100% manufacturer compatible with Toshiba OEM part numbers PA3176U-1BRS, PA3084U-1BAS, and PABAS012. This precision-engineered battery is designed for use in the Toshiba Portege 4000, Tecra 9000, DynaBook SS M3, and other series of Toshiba notebooks. • Chemistry: Li-Ion • Rating: 10.8Volts 4000mAh • Color: Champagne • Dimensions: 5.0 x 2.75 x 0.76 • Full 1 year warranty