HP 6520S 6520 6820S HSTNN-OB51 Compatible 4800mAh Laptop Battery
Battery Type:Li-ion.
Voltage: 10.8V.
Capacity: 5200mAh.
Color: Black.
Compatible notebook models:HP 6520S,6520,6820S Series.Compatible part numbers:HSTNN-OB51 .HSTNN-OB51 P/N:NBP6A73/6520.NBP6A73 .STL-CHA-SON