Laptop Battery PATONA for HP EliteBook 840 G3, 4500mAh, Li-pol, 11.1V:Has your laptop battery been losing charge? The battery PATONA for HP EliteBook 840 G3, 4500mAh, Li-pol, 11.1V is a backup power supply for selected models of HP laptops. A dead laptop battery or a power cut wont catch you off guard. A backup laptop battery is suitable as a second battery for your travels when you cant access an electrical outlet, but still need to keep your laptop running. PATONA for HP EliteBook 840 G3, 4500mAh, Li-pol, 11.1V Battery Key Features Alternative Li-pol battery Safe substitute for the original battery Capacity: 4500mAh, voltage: 11,1V Compatible with HP laptops, more specifically the EliteBook series Supplies your laptop with power when you are on the go Delivers an improved battery life and increases your productivity Tip: Frequent use causes a reduced battery life. Please follow the instructions on correct handling and charging that can be found in the manual to prevent capacity loss.