Replace the old or faulty battery in your device with the eReplacements Notebook Battery. It is compatible with the HP EliteBook 755 G3, 755 G4, 840 G2, ZBook 14 G2 and more notebooks. This lithium polymer battery has a capacity of 4150 mAh that provides hours of uninterrupted usage time. The battery is made using superior quality cells and stringent safety and engineering control standards.