Mitac BP-8050 replacement laptop battery by Amstron is made from the highest quality cells and parts. Amstron provides reliable, high performance replacement batteries for your Sony laptops. The LMI-11 is designed to be 100% manufacturer compatible with OEM part numbers BP-8050, 441681730001, 441681790002, 7035210000 and more. This precision-engineered battery is designed for use in the Advent 8050, Bullman A-Klasse 6 CEN, Mitac 5033, Packard Bell Easy Note R4, WinBook W300 and other series of notebook models. • Chemistry: Li-Ion • Rating: 11.1Volts 4400mAh • Dimensions: 8.14 x 1.91 x 0.84 • 7 Position Connector • Full 1 year warranty