I've got a customer with a Radionics 7212B1 panel that has started giving me the following errors in the last week:

Central Station gets a Low Battery on Zone 9 report (there are no wireless zones), red flashing low battery LED on the board. Keypad reads "Service Battery Missing".

Both batteries tested good, charging voltage is good, AC power is good, no shorts on aux outputs. The batteries that are in there were replaced October 2006.

I reset the panel from the onboard jumper which cleared the problem, for about 36 hours, but customer called and said it's reading the error again.

I guess I could just replace both batteries with brand new ones. Seems like a bit less than 2 years life on batteries isn't right, but it could be I guess.

Has anyone else experienced this on a Radionics combo Fire/Burg panel?