The battery in this carbon monoxide detector does not need to be changed regularly as it is equipped with a permanently installed 10-year battery. This powers the device for the entire service life of the sensor, which is also 10 years.
You do not need a replaceable battery for the Grundig carbon monoxide detector with the article number 8711252231471, as it is equipped with a 10-year battery that lasts for the entire service life of the device.