Superb Choice Laptop Replacement Battery for HP/Compaq 8510 395794-422 nc8200 nc8230 nc8430 nx9400 nx9420 Type: Li-Ion Voltage: 14.4v Capacity: 4400MAH; 8 cells; 1 year replacement warranty,30-day refund guarantee after the purchase. High Capacity Replacement battery. High Capacity Replacement battery. High capacity battery certified by CE and RoHS, This battery was tested and proven to match and/or exceed original specifications of HP products. Each Superb Choice battery was tested at an original laptop by the manufacturer.