> Russell McMahon wrote:
>> There is anecdotal evidence from other sources who claim to have=20
>> had
>> firsthand success regenerating Li Ion batteries by this means.

>> ...

>> Rejecting the possibility of such
>> mechanisms existing, out of hand, may blind you to useful new
>> knowledge. And, in any given situation, may not. Unless one is=20
>> utterly
>> expert at judging such situations a priori it can pay to err on the
>> side of careful open mindedness.

> Some old "wives tales" or "urban legends" actually do work, although=20
> almost
> never due to the supposed mechanism.  Many are just bunk.  In=20
> general I
> wouldn't offer one as advice without solid evidence.  Else how is it=20
> really
> any better than the dead fish method that "everyone knows" works?

It's not. But it was stated as personal experience by a list member.=20
If waving a dead fish was found to fix dead batteries it could be=20
reported. If freezer-ising did, it too can be reported. Small sample=20
sizes are not good for drawing solid conclusions from, but practical=20
experience is worth at least noting rather than just rejecting out of=20
hand.

> In this case however, I'd stay away.  Lithium batteries have the=20
> nasty habit
> of catching fire and taking the nearby surroundings with them.=20
> These are
> not things to handle outside published specifications without taking=20
> some
> serious precautions.

Published specs will vary with manufacturer, and frezer temperatures=20
will also vary and are usually unknown, BUT storage temperature specs=20
for Li Ion battteries are around or below the level liable to be=20
encountered in a freezer. (But may not be in individual cases :-) ).

It's hard to quickly find minimum stirage temperature specs, but=20
here's some quidelines.

eg

1.    -20C
            http://support.radioshack.com/support_tutorials/batteries/bt-=
liion-main.htm

2.    -20C
Moli Energy Lithium Ion Battery Storage: Storage temperature range=20
is -20 to 60=B0 C. Recommended storage voltage range is 4.1 to 2.0 volts=20
per cell. For prolonged storage periods, store discharged [i.e. 2.0 to=20
3.0 volts per cell] and at -20=B0 to 25=B0 C.

        http://www.powerstream.com/Storage.htm

3.    Eveready L91 Lithium

This is NOT directly related but is interesting. Storage and operating=20
=3D -40C to +60C.



            RM=20

--=20
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