Re: Smoke detector and rechargeable 9V battery?

[stu@xxxxxxxxxx]

hapticz@xxxxxxxxxxxxx wrote:
> 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 chemic=
al
> reaction,
>
> recharge types ones are only poor storage devices.
>
> <stu@xxxxxxxxxx> wrote in message
> news:1164499591.585787.326960@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > Is there any reason, legal or electrical why a rechargeable battery
> > coud not be used in a smoke detector?
> >

http://www.sanyo.com/batteries/lithium_ind.cfm

Lithium Batteries
What is a Lithium Battery?
It's a battery that uses lithium metal or a lithium aluminum alloy in
its negative electrode (anode) and manganese dioxide in its positive
electrode (cathode). SANYO's primary lithium battery (CR series) was
first released in 1976 and its secondary (rechargeable) lithium battery
(ML series) was released in 1989. These batteries meet market needs
with their high technology and superior quality.

CR Series Features


High operating voltage of 3V and high energy density

Wide operating temperature range: -40=B0C to 85=B0C (depending on type)

Low self-discharge rate (0.5% per year at room temperature)

High capacity cylindrical type

UL approved

SO9002 certified
ML Series Features


High operating voltage of 2.5V

Wide operating temperature range: -20=B0C to 60=B0C

Low self-discharge rate (2% per year at room temperature)

Superior charge and discharge cycle
=20
Able to charge at 2.8V=20
=20
UL approved