Re: I need a low voltage expert

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Jun 30, 5:00=A0pm, obmcclintock <f...@xxxxxxxxxxxxxxx> wrote:
> I have a technical question about low voltage in an alarm system. I
> have a 10 year old radio shack 8 zone burglar/fire alarm panel with a
> small rechargable back up battery. I would like to replace it with a
> larger wet cell battery just in case our power is out for quite a
> length of time. I will place it in a vented box close to the panel. My
> question is; Can I use a battery much larger in size and amp hours
> than the little one as long as the voltage is the same- 12 volts? Will
> I run the risk of burning something out as I can not afford to replace
> it now that my work is becoming scarce. Please can someone help me
> with this question, thank you!!!

No can do must use a lead/gel acid battery or risk of fire.
the panels charger is not designed for wet cells.

could put a bigger lead/gel  acid in most panels can handle 7-10 amp
battery no problem.
if you do put bigger than that  the charger in the alarm panel will
never be able to keep up proper charge and burn out.

you could set up a wet cell and separate charger and then shift it
over with a relay to burg panel but not economical to do so and must
be done so very carefully or risk of fire damage. best bet would be to
get 1000 or bigger VA  UPS uninterpretable power supply and plug alarm
into it . about $150.00
this way UPS battery will hold panel up then when its battery runs out
the panels battery takes over have done this many places and it works
very well.