The Ring Video Doorbell 2 Battery Pack is a black battery designed specifically for the Ring Doorbell 2 model. It is compact, with dimensions of 2.75 inches in height, 1.75 inches in width, and 0.9 inches in depth. The battery pack weighs 1 pound and has a sleek grey finish. It is a convenient and essential accessory for keeping your Ring Doorbell 2 powered and operational at all times.