HP ProBook 6450B battery,4400mAh battery for HP ProBook 6450B laptop 6 cells
TD06 Laptop Battery For HP ProBook 6450b 6550b 6555b 6440b 6445b 6540b 6540b EliteBook 6930p 8440p 8440w - AliExpress
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