OEM HP CO06XL Ultra Battery E7U23AA for HP EliteBook 840 G1 745 G2 755 ZBook 14 | eBay
HP EliteBook 840 G1 review: A gem of a business laptop | PCWorld
Replacement Battery For Hp Elitebook 840 G1 845 G2 Hstnn-ib4r 717376-001 Cm03xl Laptop Battery - Buy Battery For Hp 840 G1,Cm03xl,Laptop Battery For Hp Product on Alibaba.com