Amazon.com: AC Doctor INC Laptop Battery for HP ProBook 640 645 650 655 G0 G1 PN: CA06 CA06XL HSTNN-DB4Y HSTNN-LB4Z HSTNN-LB4X HSTNN-LB4Y HSTNN-LP4Z, 5200mAh/10.8V/6-Cells : Electronics
HP ProBook 6450B - 6 Cell TD06 Original Laptop Notebook Battery
eReplacements Compatible 9 cell 7800 mAh battery for HP Probook 6450b 6545b 6550b 6555b For Notebook Battery Rechargeable 7800 mAh 11.1 V DC - Office Depot