I’m having the same problem. I have the Ring 2 doorbell, hardwired. It worked for the 1st year. Now the 2nd year, I’m having to charge the battery more often.
I do live in a cold climate but it worked wonderful last year in colder temps. We are having a much nicer weather & now having to keep charging it. I don’t receive any emails letting me know the battery is low. It’s when it quits announcing “motion detected at the back door” is when I know it has to be recharged.
I do pay the yearly charge for Ring cloud? or whatever it is. Not sure that it’s worth it now. I also have cheap Wyze cameras which are more dependable than the Ring 2 doorbell now. Frustrated I have to keep taking the battery out to recharge.