battery suitable for HP EliteBook 840 G1 laptop (4500mAh, 11.1V, Li-Polymer, black) - Electropapa
HP Elitebook 840 G1 Battery Replacement - iFixit Repair Guide
HP Elitebook 850 G2 Battery
CS03XL Battery for HP Elitebook 840 G3 G4 854108-850 800513-001 11.4V US - Newegg.com
HP EliteBook 840 G1 850 G1 Battery
Hp EliteBook 840 50Wh Replacement Laptop Battery
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Green Cell Battery - HP EliteBook 840 G2, 850 G2, ZBook 15u G2 - 4000mAh
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HP 719320-2C1 - CO06XL 6-Cell Ultra Extended Battery for HP Elitebook 840 G1 745 G2 755 Zbook 14 - CPU Medics
New 11.1V 60Wh CO06XL Ultra Extended Battery for HP EliteBook 840 G1 ZBook 14 E7U23AA - Walmart.com