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
Amazon.com: AC Doctor INC Laptop Battery for HP ProBook 4330s 4331s 4430s 4431s 4530s 4535s 4435s 4436s 4440s 4441s 4446s 4540s 4545s 7420, 5200mAh/6-Cells : Electronics