Aico Ei144e Heat Alarm Mains Powered with a 9V Alkaline Battery
Aico Ei144e Mains Powered Easi-Fit Heat Alarm with 9V Battery Back-up (Pack of 4) | Click4Electrics
Aico Ei144RC Heat Alarm
Replacing Back-up Batteries in Ei Electronics Alarms | An alarm without a battery will not alert you in the event of a fire. Test your alarms weekly & replace batteries when low #