GE ARITECH FP400 Series Installation Manual page 24

Aux + sounder + pc + de = zc
pc (FP408) = 145
50 + 300 + 145 + 2 = 497
Battery current (Ah) in alarm (bxa):
zc x 0.5
----------- = bxa
1000
497 x 0.5 /1000 = 0.2485
Battery life (hours):
(bc - ba)
------------ = hours
(sc/1000)
bc (FP408) = 5.6 Ah
(5.6 - 0.2485)
------------------ = 33 hours
(162/1000)
24 FP400 Series Installation Manual