How Long Does A House Alarm Backup Battery Last. When you install a home battery what you are really doing is providing your home with a backup energy reserve in the case of an outage. Capacity is measured in kilowatt-hours kWh and can vary widely from 1 kWh or less to over 10 kWh.
The primary power source for this type of alarm is the electricity from your home. How long should an alarm battery last. I installed the alarm system myself in 1999 and Ive regularly changed the panel back up battery every 4 to 5 years but the bell box battery has never been changed.
Motion sensor batteries and the batteries on window and door contacts also last about 3 to 5 years but some of the newer devices coming out can last as long as 7 years.
How long does a backup alarm battery last during a blackout. Luckily with the alarm system itself you might be saved for a few hours by a backup battery or even long enough to protect the home until power is restored. Motion sensor batteries and the batteries on window and door contacts also last about 3 to 5 years but some of the newer devices coming out can last as long as 7 years. The Cost of Replacing Alarm Batteries.
