I bought a new smoke and CO2 detector combo and lo and behold you DO NO CHANGE THE BATTERIES EVER. I thought it was a misprint. Supposedly, the new units last 10 years and you change the whole unit not the batteries. It’s the darnedest thing. I have about 9 1/2 years left so I don’t know if they last that long yet but you better believe I will be checking them regularly.
I bought a new smoke and CO2 detector combo and lo and behold you DO NO CHANGE THE BATTERIES EVER. I thought it was a misprint. Supposedly, the new units last 10 years and you change the whole unit not the batteries. It’s the darnedest thing. I have about 9 1/2 years left so I don’t know if they last that long yet but you better believe I will be checking them regularly.