This product is a high-capacity replacement battery specifically designed for the Ring Video Doorbell 1st Generation (Model B15169). Please note: It is not compatible with subsequent models such as Doorbell 2/3/4, Pro, or Elite editions. Featuring a high-quality lithium polymer cell with a capacity of up to 5000mAh, this battery significantly extends runtime and reduces charging frequency. An integrated smart protection chip provides comprehensive defense against overcharging, over-discharging, overheating, and short-circuit risks, ensuring safe operation. Precisely matching the original dimensions, it offers easy installation. Durable and efficient, this battery comes with reliable after-sales support, making it the ideal choice for upgrading your device's battery life.