I have just tried to setup the battery doorbell connecting it to the existing doorbell wiring. When I turn the power breaker/fuse on the existing chime just keeps ringing until I turn off the mains power. How you I get this working so that the battery is charged using the mains power in the uk?
I installed mine last week without any problem - it charges and operates the existing doorbell. I had an 8v transformer with a ding/dong type of doorbell (ie with two metal plates and a striker). When installing the Eufy battery doorbell there were two options to choose from to work an existing bell - ding/ding or electric, or something like that. Have you chosen the right option for your bell? Is it in the supported voltage range (8v - 24V AC).
Mine must be 25+ years old - no idea of the make. There’s no list of comatible chimes - just the supported voltage range. Have you tried both the chime setup options? Mine needs the Mechanical setting not Digital.