Re: Smoke detector and rechargeable 9V battery?

[Frank Olson <Use_the_email_links@xxxxxxxxxxxxxxxxxxxxxx>]

G. Morgan wrote:
> On Sun, 26 Nov 2006 02:24:04 -0500, "Robert L Bass"
> <robertbass1@xxxxxxxxxxx> wrote:
>
>
>>Lithium cells have a different discharge gradient from alkaline cells.  When a typical alkaline cell reaches the point where the
>>detector starts to signal a low battery condition, there is a predictable remaining life in the cell.  IOW, it will continue to
>>function for a sufficient period.  IIRC, lithium cells degrade at a fairly steady rate and then drop off sharply.  Assuming it's
>>lithium cells and not some other type of rechargeable cell that this applies to, that would make them unacceptable for use in many
>>smokes.
>
>
>
> Lithium batteries are NOT rechargeable.  So the OP is talking about
> NiMH or NiCad.  What you say is true, if you're talking about NiMH or
> NiCad cells.
>
> 9V Lithium batteries are the best choice for smoke detectors because
> they last so long, as much as 10 years.  You just can't recharge them.
>
>


Lithium batteries are NOT the "best choice" for smoke alarms.  Making
such a generalized statement is both unprofessional and unsafe.  Smoke
alarms are "life safety".  The batteries should be replaced with new
ones once a year.  Use a good quality NEW alkaline battery and *always*
follow the manufacturer's recommendations.