Laptrix Laptop battery for the above model is made from high quality parts and Laptrix confirms the specifications similar to your laptop requirements. The battery passes all the necessary certifications like CE ROHS CB etc. henceforth confirms the best quality durability and performance. It wont get drained easily and lasts longer adding high back up and extra performance. The voltage and capacity of cells meet exactly with your requirement compaq hp 6530 6730 6930 hp elitebook 6930 8440 8530 hp probook 6450 6540 6550 series laptops Battery Ratings : Li-Ion 10.8V 4400mAh Supported laptop Models: HP COMPAQ 6530b HP COMPAQ 6530s HP COMPAQ 6535b HP COMPAQ 6730b HP COMPAQ 6735b HP COMPAQ 6736b HP EliteBook 6930p HP EliteBook 8440p HP EliteBook 8440w HP EliteBook 8530w HP ProBook 6440b HP ProBook 6445b HP ProBook 6450b HP ProBook 6455b HP ProBook 6540b HP ProBook 6545b HP ProBook 6550b HP ProBook 6555b. Compatible part numbers : HSTNN-CB69 HSTNN-I44C HSTNN-I44C-A HSTNN-I44C-B HSTNN-I45C HSTNN-I45C-A HSTNN-I45C-B HSTNN-IB68 HSTNN-IB69 HSTNN-LB0E HSTNN-UB68 HSTNN-UB69 HSTNN-UB85 HSTNN-W42C HSTNN-W42C-A HSTNN-W42C-B HSTNN-XB0E HSTNN-XB24 HSTNN-XB59 HSTNN-XB61 HSTNN-XB68 HSTNN-XB69 HSTNN-XB85 KU531AA TD06. Model Name :HP Business Notebook 6530b Battery Fit With Following Models: Compaq 6500bCompaq 6530bCompaq 6535bCompaq 6700bCompaq 6730bCompaq 6735bEliteBook 6930pEliteBook 8440pEliteBook 8440wProBook 6440bProBook 6445bProBook 6450bProBook 6540bProBook 6545bProBook 6550bProBook 6555bBusiness Notebook 6530bBusiness Notebook 6535bBusiness Notebook 6730bBusiness Notebook 6735b ~Model Number :Laptop Battery Compatible for HP Business Notebook 6535b 6555b 6735b 458640-542 HSTNN-144C-A HSTNN-UB68 KU531AA HSTNN-XB59 HSTNN-C68C HSTNN-145C-A ~