Hi there, Cellphone.
I am glad to hear that you are interested in the new Nest Hello Battery doorbell! I would love to assist you with your question because you will definitely need to know how to charge it.
Use the included USB cable to fully charge your doorbell for battery-powered installation. Keep it plugged in during setup so that it can connect to the app and the Wi-Fi network. The status light will pulse white when your doorbell is charging, and will appear solid white when it's completely charged. Please let me know if you need further assistance.
Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.
I appreciate the help, Emerson.