Green Cell PH06 HP16 is a replacement laptop battery for selected HP, Compaq and ProBook computers. Its lithium-ion cell pack is intended to provide portable power when the laptop is away from a mains outlet.
The battery uses six Li-ion cells and has a listed capacity of 4400 mAh. Green Cell specifies voltage as 10.8 V / 11.1 V. The manufacturer also lists protection against overcharging and overdischarging.
The stated compatible families and models include HP 420, 620 and 625, Compaq 420, 620, 621 and 625, and ProBook 4520.