<h3>Key features</h3><ul> <li>[For Ring S2 Battery 6 Pin]: compatible with for doorbell 2nd generation. Please double check if it is compatible with your device. NOT for S1(5Pin) and V4</li> <li>[For Ring Doorbell 2nd Generation Battery]: has 5200mAh high capaticy and 3.8 Volts. Delivers long-lasting power, reducing the need for frequent battery swaps</li> <li>[For Ring Doorbell Gen 2 S2 Battery 6 Pin]: Replacement battery for ring video doorbell built-in protection functions, such as: overcharge, overheating, short-circuit, and so on. These mechanisms work in conjunction with each other, giving priority to ensuring a safe and stable power supply and the normal operation of the doorbell</li> <li>[S2 Lithium Battery Model]: for ring is fast charging and portable. Ideal for use as a backup battery. Engineered to match the exact dimensions and connectors of the original batteries, ensuring hassle-free installation and reliable performance</li> <li>[Rechargeable Battery for Ring Doorbell]: comes with year warranty, if you have any question, please don't hesitate to contact us</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>