Features:1. Equipped with a charging indicator light, the light shows red when charging and green when fully charged.2. Easy to install, quick release tabs allow for easy battery installation.3. The capacity is 6040mAh and can last up to 7 days depending on your device settings.4. The built-in smart chip has over-voltage protection, over-current protection, short circuit protection, and high temperature protection.5. It adopts PC shell, which is flame retardant, high temperature resistant, wear-resistant, drop-resistant and has a long service life.6. The contact points are made of anti-oxidation metal, which is not easy to rust and does not easily lead to poor contact.Note: this battery is specially designed for the brand Ring Doorbell 2/3/4 series doorbells.