I've discovered that NiMH AA batteries that were in the old Pentax DS body
(remember those?) were completely dead.
I tried to put them in renown La Crosse charger (BC-900), and that refused
to charge them.
I was able to resuscitate them by putting them into a "fast" Duracell
charger, and then trying to start charging a few times by plugging that
charger into the power outlet. At first, that charger also refused to
charge them, but after 3-4 attempts, the first pair started charging, and
then (after that pair was somewhat charged, so that I can put them in
BC-900), I did 2-3 more attempts with the second pair, and it worked.
I suspect BC-900 was a bit too gentle with the initial charge attempt.
But it is also possible that it could have worked if I tried a few more
times.
I am not sure how well these batteries will work, the time will show.
But at least this allowed to charge them up.
An alternative would be to use a 1.5 V power supply, but this trick was
simple enough.
I thought this might be useful to somebody.
Igor
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