HP Elitebook 840 G1 Battery Replacement - iFixit Repair Guide
Hp EliteBook 840 G4 Laptop Battery, High quality Hp EliteBook 840 G4 Laptop Battery
REPLACEMENT L78555-005 BATTERY FOR HP ELITEBOOK 840 G7 G8 53WH L77608-421 CC03XL | eBay
4250mAh New Original Laptop Battery CM03XL Genuine Battery for HP EliteBook 840 850 ZBook 14 CM03XL|battery for hp|original laptop batterylaptop battery - AliExpress
CS03XL Battery for HP Elitebook 840 G3 G4 854108-850 800513-001 11.4V US - Newegg.com
HAKO For HP EliteBook 840 G2 6 Cell Laptop Battery - HAKO : Flipkart.com
HP 719320-2C1 - CO06XL 6-Cell Ultra Extended Battery for HP Elitebook 840 G1 745 G2 755 Zbook 14 - CPU Medics
Green Cell Battery - HP EliteBook 840 G2, 850 G2, ZBook 15u G2 - 4000mAh