Type: Li-Ion, Voltage:11.1V Capacity:4400mAh;6 cells • 1 year replacement warranty. • High capacity battery certified by CE and RoHS, This battery was tested and proven to match and/or exceed original specifications of Lenovo products • Fit Machine Models: Lenovo G Series G430 G450 G530 G550 G550-2958LEU G550-2958LFU