The Genuine V4 Bell Battery for Ring Video Doorbell is a rechargeable battery designed specifically for the Ring Video Doorbell 2, 3, 4, Spotlight Cam, and Stick Up Cam. With a power capacity of 6040mAh and a voltage of 3.65V, this black battery ensures long-lasting power for your security camera system. The USB 3.0 connectivity makes it easy to recharge, and the CCTV surveillance technology provides reliable security monitoring for your home. Trust the Ring brand for compatibility and quality assurance.