Two different battery operated door bells on one doorbell sw

[JohnW2]

If both the bells are "ding dong" ( ding when button pressed and dong when it is released ) and are the same type then ...

I thought the issue was that the bells were not of the same type, and probably not (we certainly don't seem to have been told so) 'ding-dong' ones?

Kind Regards, John

 

[bernardgreen]

My suggestion was not specific to the OP but it may be of value to others.

 

[footprints]

Or even simpler


http://www.screwfix.com/p/wireless-...-door-chime-with-li-ion-bell-push-white/97493

 

[endecotp]

If both the bells are "ding dong" ( ding when button pressed and dong when it is released ) and are the same type then connecting bells, batteries and push in series will work.

But in this case we have been told that the bells are different (they have different voltage batteries). Connecting them in series won't work in this case.

 

[bernardgreen]

If the current consumption of each bell was the same as the other bell then it would work even if the battery voltages were different.

Unlikely in the OP's set up.