On Sat, 16 Mar 2019 at 01:36, David Van Horn <
david.vanhorn@backcountryaccess.com> wrote:

> Yeah, I got bit BAD by Chinese NIMH cells some years back.   It turned ou=
t
> that they were not including as much of a certain catalyst as they should
> to help the H2 and O2 recombine.  The result was a spectacular failure th=
at
> could occur spontaneously, even with the cells completely removed from th=
e
> product and just sitting on the table.
>

Yes. Your accounts of your NimH woes cautioned me when I became involved.
Up to about 1600 mAh, maybe 1800-2000 the catalyst levels allow trickle.
2000 mAh up trickle charge is a non-no.

I came to dislike NimH severely in the applications I was involved with.
They are OK in a controlled environment where any of the major charge
terminate methods can be relied on, but in a variable and high temperature
environment with variable or no charge they are nasty to handle well.
LiIon, despite all the claims re them being 'tricky'. are a joy to deal
with compared.


      Russell






> --
> David VanHorn
> Lead Hardware Engineer
>
> Backcountry Access, Inc.
> 2820 Wilderness Pl, Unit H
> Boulder, CO  80301 USA
> phone: 303-417-1345  x110
> email: david.vanhorn@backcountryaccess.com
>
>
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