Amazon.com: TREE.NB TD06 Battery for HP EliteBook 8440P 6930P 6530B 6730B ProBook 6455B : Electronics
Amazon.com: Futurebatt Battery for HP EliteBook 8530p 8530w 8540p 8730p 8540w 8730w 8740w HSTNN-LB60 : Electronics
Compatible 8 cell 5200 mAh battery for HP Elitebook 8530p 8540p 8540w 8730w For Notebook Battery Rechargeable 5200 mAh 69 Wh 14.4 V DC 1 - Office Depot