Just for reference, they have released their battery powered door bell and camera now.
https://www.cnn.com/2021/08/24/cnn-underscored/new-nest-doorbell-2021-review/index.html
https://www.google.com/amp/s/amp.cn...rscored/new-nest-cam-2021-preorder/index.html
https://www.cnn.com/2021/08/24/cnn-underscored/new-nest-doorbell-2021-review/index.html
https://www.google.com/amp/s/amp.cn...rscored/new-nest-cam-2021-preorder/index.html