UBatteries Spare Battery HSTNN-UB72 For HP Pavilion dv4 dv5 dv6 Series - 6 Cell, 4400mAh UBatteries Li-Ion Replacement Laptop Battery; Grade A Cell Type: 6 Cell Lithium-Ion | Voltage: 10.8V | Capacity: 4400mAh | Rating: 48Whr CE ROHS Certified One Year Warranty, 30 Days Return