So how long do batteries last in thermostat units?
You probably didn't give it a second thought until your living room felt like an ice box or a sauna, but knowing how long do batteries last in thermostat displays is the kind of boring-but-essential home maintenance that saves you a massive headache. Most people just assume these things run on magic until the screen goes blank and the furnace stops clicking on. Generally speaking, you can expect a fresh set of high-quality batteries to last anywhere from eight months to a full year, though some low-drain models might stretch that to two years if you're lucky. ...