Advice on new Ring Bell

We currently have a: All-new Ring Video Doorbell – 1080p HD video, improved motion detection, easy installation – Satin Nickel (2020 release)Although it is attached to the doorbell wiring to my house, it is no longer charging. We have to keep unscrewing it and bringing it inside to charge via USB. I know the wiring is still hot, because the doorbell still rings in the house. After charging to full, the battery runs out after a week or so and I have to unscrew it again.  What could be going on?If I need to replace it, I need to decide between the Ring Video Doorbell – 1080p HD video, improved motion detection, easy installation – Venetian Bronze (I think just the updated version of what I have) OR Ring Wired Doorbell Plus (Video Doorbell Pro) – Upgraded, with added security features and a sleek design (existing doorbell wiring required) Price is less of a consideration but I need one that I NEVER have to unmount and bring inside. Need it to charge via the doorbell wire. If there could possibly be an issue with my wiring, how would I check?