@Sandra21
If your battery doorbell is wired "to your existing doorbell wiring, the wires don’t directly power the doorbell. Instead, the battery is trickle charged by the power that comes through the wires, and the doorbell runs off the battery charge. At temperatures between -4°F (-20°C) and 32°F (0°C), the doorbell can continue to work, but the battery will drain because it can’t be charged. If the battery drains completely, the doorbell will shut down, and you’ll need to bring it inside to be charged." (https://support.google.com/googlenest/answer/11830989)
If you need to charge it, use the included USB-C cable that came with your doorbell.
We live in Minnesota, so with our cold weather, the battery doorbell is not very practical.
