First Alert FA215 - how to replace the battery?

The FA215 is a keypad model number. The main control panel should be located in a hall or bedroom closet. I am sure you will need a 12 volt, 4 AH lead acid battery. Most ACE Hardware stores carry it.

Jim Rojas

Hello snipped-for-privacy@gmail.com,

The keypad doesn't have a battery in it. Instead, find the master control panel (metal cabinet attached to the wall somewhere) and open it. Inside is a large, rechargeable battery. It's either a 12 Volt 4 AmpHour or 12 Volt 7 AmpHour model. Either one will work but a 7 AH unit will last longer during a power outage. They're both inexpensive, retailing online or locally for about $15-20.

Thanks to both of you for your quick response.

Is it reasonable for this battery to die within three and half years?

I don't recall replacing any such battery in our old house and we stayed there for 6 years.

Thanks again for your help.

snipped-for-privacy@gmail.com inspired greatness with:

Yes. It's probably a cheap battery. The max lifetime I get from a brand name batt. is 4-7 years.

Yes. The last anywhere from 3 to 5 years. Occasionally one will ast longer but most don't.