On 07/10/2019 18:06, Tim+ wrote:

Um, you do know that the external sounder and strobe are additionally
powered by a second non-rechargeable battery?

My bell box has a rechargeable battery that is also trickle charged in
my wired system via the alarm panel. My bell box also has red flashing
LEDs so a self contained non-rechargeable battery may not last that long.

The tamper circuit in a bell box is often a spring loaded mechanical
switch which when the box is removed from the wall is activated.


Theres no need to postulate a €œsluggish battery€� theory. The voltage from
the duff battery is just too low to run the system when theres a power cut
and this triggers the tamper circuitry.

The bell box battery doesn't power the alarm panel which, in my case,
has its own loud sounder.

Once triggered by a power cut the alarm can be disabled and run normally
from the old battery which you suggest has a voltage too low to run the
system.



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