The 3.7V 850mAh 3 Pin Battery AS553640 is a solid-state rechargeable battery manufactured by A&S. With a voltage of 3.7V and a capacity of 850mAh, this LiCo2 battery is suitable for a range of sound and vision devices. It comes with a manufacturer warranty of 1 year, making it a reliable and long-lasting power source for your electronic devices.