#6080, "RE: for the innovators ... heres a challenge" In response to In response to 14
I don't see why you couldn't use it like it is. I mean, they have LED low battery indicators on the switch. If you mount the switch where you can see the LED then all you have to do is switch the battery when it gets low. One more thing about that - the ringer only uses batteries when the button is pressed so it'll probably last a long long time.
Also, as far as wiring into the switch, you could use a relay to "ring the bell". When your alarm goes off, it sends power to this sidemarker circuit. You could use that circuit to operate the relay, and wire the doorbell ringer into the relay so that when the relay is switched(alarm goes off) the button is "pressed". The good thing about seperating the ringer from the alarm with a relay is that you wouldn't have to worry about any differences in voltage/amperage between the two systems(alarm and ringer).