Re: How long do batteries typically last for wireless door sensors?

[johnr <jsowden@xxxxxxxxxxxxxxxxxx>]

On 01/17/2015 06:49 PM, JoeRaisin wrote:
> On 1/17/2015 8:06 PM, strangways@xxxxxxxxx wrote:
>> Hi
>> Im looking for a self monitored system. I was anticipating wiring the
>> sensors
>> up myself, which wouldn't have been too much of a bother, but it looks
>> like
>> most systems are wireless these days, which means easier install, but
>> you have
>> to replace the batteries. My system will require 3 door sensors. No
>> motion sensors.
>> How long do the batteries typically last in these wireless sensors? If
>> I can
>> replace them spring and fall that would be fine, but if its more
>> frequently,
>> then Id rather go wired.
>
> For most systems the batteries should last a couple years.  Replacing
> them every two years would be more than prudent.
>
> Wireless alarm systems will also tell you if a sensor's battery is
> getting low.
>
>> Please suggest hard wired self-monitored systems. THanks
>>
>
>
The batteries will last 5-7 years depending on how often the doors are
opened.  Your application sounds like a concrete room with three steel
doors with steel frames, as you feel there is no need for motion
detection.  The batteries must be replaced within 1 week (approx) from
the receipt of the low battery signal (self monitoring), as the
discharge knee of lithium batteries is very sharp.  They will cost you
from 1-3 dollars each.  I suggest you replace them all at once.  I would
also consider a motion detector, as a door and a motion detector signal
means an entry.

John
American Sentry Systems, Inc.