Google Nest Doorbell Battery charging

[higgybaby74]

Is there a way to charge this doorbell with a solar charger?  Taking it off the wall for hours at a time to charge it does not make sense because that leaves me without a doorbell for hours and can’t see who is at the door during that time. The initial charge lasted less than a month. I have a few of the Google Battery Cameras and they work really well with solar chargers. Alternatively, can this battery doorbell be charged with the two small wires from a traditional doorbell or can I run power to it?

I bought the battery doorbell because I do not have power at the wall where it is mounted. However, if taking it off the wall to charge it is the only option, I should have just run wires and bought the wired version instead so I wouldn’t have the hassle of removing it to charge. 

Any help or feedback be appreciated.

[MplsCustomer]

@higgybaby74 

You CAN connect the battery doorbell to a doorbell chime and transformer (https://support.google.com/googlenest/answer/10732535), in which case "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" (https://support.google.com/googlenest/answer/11830989).

And Google Nest sells a Wasserstein Solar Panel for the battery doorbell:

https://store.google.com/product/wassersteinsolar_panel

[higgybaby74]

It looks like the solar panel is not in stock and got a 3/5 rating.