V7 42T4813-V7 Battery for select LENOVO IBM laptops(5200mAh, 48 Whrs, 6cell)42T4812,42T4813 Built with high quality components thats fit select HP COMPAQ laptops Volts: 10.8V, Cells: 6 Cells, Chemistry: Lithium-ion, Capacity: 4400mAh Replacement for OEM battery part number 451085-121;451086-161;451545-251;456865-001;491278-001;GJ655AA;HSTNN-FB51;HSTNN-IB52;NBP6A73;STL-CHA-SON 1 year manufacturer's warranty Manufactured with high quality battery cells Replacement laptop battery for Business Notebook 515, 550, 610, 6530S, 6531S, 6720S, 6730S, 6735S, 6780S, 6820S, DC7700 Meets or exceeds original OEM specifications 1-year warranty