HASESS&reg; Laptop Battery for HP Pavilion DM4 DV3-4000 DV5-2000 DV6-3000 DV6-6000 DV7-4000 DV7-6000 Series; Fits WD549AA WD548AA#ABB HSTNN-LB0W 636631-001 593550-001 - 12 Months Warranty [Li-ion 6-cell 5200mAh/56WH]