USTOP Extended Battery for HP Pavilion DV4 DV4T DV5 DV5T DV5Z DV6 Battery Replacement HSTNN-IB73 HSTNN-LB72 HSTNN-LB73 HSTNN-UB72 HSTNN-UB73 HSTNN-XB72 HSTNN-XB73 100% Brand new replacement battery. 10.8V/4800MAH color:black Super fast delivery +30 days money back guarantee ,1 year warranty CE FCC certificates