Battery charge before hardwiring?

Hello! I’m hardwiring a video doorbell 4, and thought once connecting the power that the doorbell would not require a battery. Is that incorrect, and does the device’s battery also need to be charged before hardwiring?

Thanks for the help!

Hi @user46620. Hardwiring a battery powered doorbell will provide a constant trickle charge to the battery. This Help Center article here will explain this more in detail. I hope this helps.