The product is a brand new Nokia BL-4J battery designed for the Nokia C6-00, C6, and Lumia 620 models. Made of aluminium and featuring a grey colour, this Li-Ion battery has a capacity of 1200mAh and a voltage of 3.7V. It is a spare battery with one port and is compatible with the mentioned Nokia devices. Designed for connectivity through a wired/phone antenna port, this battery is manufactured in China by Nokia.