The Ring Video Doorbell 2 Battery Pack is a black, grey-finished battery designed specifically for the Ring Doorbell 2 model. This battery pack includes one battery that is compatible with the Ring brand and has dimensions of 2.75 inches in height, 0.9 inches in depth, and 1.75 inches in width. It weighs one pound and is a perfect replacement or backup for your Ring Video Doorbell 2, ensuring continuous operation without interruptions.
eBay