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RE: [OM] Frozen 357s

Subject: RE: [OM] Frozen 357s
From: "Ian A. Nichols" <I.A.Nichols@xxxxxxxxxxxxx>
Date: Mon, 19 Mar 2001 09:10:38 +0000 (GMT)

On Fri, 16 Mar 2001, Chip Stratton wrote:

> Silver oxide cells will lose about 100er year of their total capacity when
> kept at room temperature i.e. 20-25 degrees Celsius.
> 
> Keeping them cooler than room temperature WILL slow this down, though I
> can't tell you offhand by how much.

A good approximation (for all chemical reactions) is half the rate for
every 8 deg C drop, so by keeping them in a fridge at about 5 deg C you
can reduce that to about 2.5%.  Not sure what effect freezing has but
I'd imagine it would be much more dramatic (but pointlessly so if the
cell is damaged as a result).
 
> When you take your tiny little cell out of the fridge/freezer, hold it
> tightly in your warm hand for about 30 seconds, and it probably will be warm
> enough to no longer condense moisture on its surface. Then wipe it off, you
> don't want the salts from your fingers to accelerate oxidation of cell or
> contact surfaces.

Or just keep them in their blister packs inside a grip-strip polythene
bag so the airborne moisture doesn't get to them.

-- 
________________________________________________________________________
*             |                                                        |
|  /  | |/-\  |                      Ian A. Nichols                    |
| |   | |   | |             http://www.chm.bris.ac.uk/~cpian/          |
|  \-/| |  /  |                  i.a.nichols@xxxxxxxxxx                |
|             *                    iann@xxxxxxxxxxxxx                  |
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