Description Compatible Models：( Ctrl F for fast search your laptop model) HPBusiness Notebook 6535b Compaq 6500b Compaq 6535b HP Compaq 6700b Compaq 6730b Compaq 6735b HP EliteBook 6930p EliteBook 8440P EliteBook 8440W HP Compaq 6530b ProBook 6440b ProBook 6445b ProBook 6450b ProBook 6540B ProBook 6545b ProBook 6550b ProBook 6555b Compatible Part Numbers： 458640-542 482962-001 484786-001 HSTNN-144C-A HSTNN-144C-B HSTNN-145C-A HSTNN-145C-B HSTNN-C66C-4 HSTNN-C66C-5 HSTNN-C67C-4 HSTNN-C67C-5 HSTNN-C68C HSTNN-CB69 HSTNN-IB68 HSTNN-IB69 HSTNN-UB68 HSTNN-UB69 HSTNN-XB24 HSTNN-XB59 HSTNN-XB61 HSTNN-XB68 HSTNN-XB69 KU531AA