Hi @KingLord. When you wire your Doorbell 2 to an existing doorbell circuit with a compatible transformer and chime kit, it will provide a trickle charge to the battery that can help keep it topped off. If the Doorbell is experiencing a large number of motions, dings, and Live Views, the battery may drain more quickly than it can charge from the wiring. On top of a reset, you may want to try a new setup of the Doorbell as well by following the steps under Set Up a Device.
If the Doorbell still does not appear to be charging after trying these steps and verifying the chime kit and transformer are compatible, please give our support team a call at one of the numbers available here. A member of our support team can take a closer look at your device and offer more advanced troubleshooting steps. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support.