How To Replace Smoke & Carbon Monoxide Detector Battery
The Combination Smoke & Carbon Monoxide Detector takes two (2) CR-123A Lithium 3V batteries and has a life expectancy of up to 2 years, depending on placement and usage.
To change your Smoke & CO Detector battery, twist it off its bracket and open the back panel. Then, replace the lithium batteries and put the device back in place.