Electric power source

Products Video Doorbells
1

I thought I purchased a compatable power source of 16 to 24 volts. However when the battery ran down and needed charging, I checked the voltage of the source and it is 28 volts. Will this work? Why does the battery run down?

2

See here
https://community.ring.com/t5/Video-Doorbells/Video-Doorbell-2-Solar-Charger-Status-quot-Connected-quot-But-I/td-p/14674/page/5