S
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- Jan 1, 1970
- 0
Is there any reason, legal or electrical why a rechargeable battery
coud not be used in a smoke detector?
coud not be used in a smoke detector?
FIRETEK said:Because they tend to lose their charge faster over time and that varies with
the battery and how many times it's been charged. Nicad's also tend to
develop a "memory" which reduces their actual usefulness even more. It's
best to stick with a good quality alkaline battery and change the sucker
every year. I change ours on my wife's birthday. That way I can take care
of two whiners at once.
Robert said: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.
From Wikipedia:
Robert,
Thanks, finally a substantive answer.
I did not know that there are any lithium batteries that may not beG. Morgan said:You already got the correct answer before RLB posted.
That's NOT what you asked; you asked: "Is there any reason, legal or
electrical why a rechargeable battery could not be used in a smoke
detector?"
Now, read the manual that came with the detector and follow
instructions. It will probably indicate an alkaline or lithium
battery IS acceptable. If you replace "lithium" with "rechargeable
batteries" in RLB's post you can extrapolate an answer to your second
question.
G. Morgan said:I bet you didn't know they can be used to make crystal meth either.
http://en.wikipedia.org/wiki/Lithium_battery#Lithium_batteries_and_methamphetamine_labs
Any relationship to Joe the senator?
--
-Graham
(delete the double e's to email)
G. Morgan said: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.
Frank said: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".
batteries should be replaced with new
ones once a year. Use a good quality NEW alkaline battery
and *always*
follow the manufacturer's recommendations.
G. Morgan said: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.
they dont hold charge long enough.
most alkaline will disharge slow enough to supply for a year.
most ni-cad ni-mh and other will retain adequate charge only for abt a
month, then need refresh
standard alkaline and zinc/acid batts actually create power from a chemical
reaction,
recharge types ones are only poor storage devices.
How can this be a substantive answer?
YOU are talking about rechargable and
he is not.
they dont hold charge long enough.
most alkaline will disharge slow enough to supply for a year.
most ni-cad ni-mh and other will retain adequate charge only for abt a
month, then need refresh
standard alkaline and zinc/acid batts actually create power from a
chemical
reaction,
recharge types ones are only poor storage devices.
G. Morgan said:No, lithium batteries are the ones used in motherboards and the ones
that come with 5800 series wireless for example. *Lithium-ion*
batteries ARE rechargeable, they are used in cell phones, laptops,
etc..
Two different batts.
G. Morgan said:Sure they are, they last longer.
It was a broad statement, I should have wrote "if the manufacturer
permits Lithium batts then they are the best choice".
http://www.brkelectronics.com/downl...smoke_alarms/Battery/manual_SA710_English.pdf"Choosing a replacement battery:
Your Smoke Alarm requires one standard 9V battery. The following
batteries are acceptable as replacements: Duracell #MN1604, (Ultra)
#MX1604; Eveready (Energizer) #522. You may also use a Lithium
battery like the Ultralife U9VL-J for longer service life between
battery
changes. These batteries are available at many local retail stores."
No where do they recommend replacing batts. yearly. I think the
battery marketing department came up with that baloney.