I built an integration for Visonic Powermax alarm sensors. Its all wireless and the batteries have lasted 3.5 years so far with no problems or replacements yet. I find it gives the perfect balance of proper standalone alarm, easy wireless installation at a decent price (it can be ratified as a full alarm system to reduce house insurance if you have it installed - though you dont need to), and yet all of the sensors can be broken out to separate devices in ST (which then trigger all the motion actions like turning on lights/…