I'm sure I've had to replace some batteries but with so many battery operated devices and having moved all of them from the house in Michigan to the one in Florida, I really can't remember. I was on ST until April this year so there is that conversion too.
Anyway. I'm using this app to monitor my battery devices and if one falls off, I'll know within a couple days. These devices report on a regular basis so I'll know within 24 hours if one has failed so battery is not a big deal.
My WADWAZ are pretty easy to get to so if I get some time, I'll hook up a couple wires to one and see how the external contact is working. Being in the sunshine state, though it's cool and rainy right now, I can open windows and doors without dropping the WAF.
