Hello Frank, Paul and William,
thanks for the prompt anwsers, so sorry, I´d had not much time so my
reply is a little bit late.
Frank van Lindert wrote:
> Even if the control LEDs don't light anymore, some of the packs still
> give 15 volts...
I checked it, and yes my pack shows then a tension of around 15V. To
avoide an deep discharge in one of the cells, I start to recharge the
pack when the LED stops to light. I´m limiting the charging time to 4
hours to avoid overcharge in the cells.
> One measurement in any 8 hours (and a few more) immediately
> after recharging) will give you a good idea of the discharge rate.
I´m going to do this during the next re- and discharging cycle.
> It is still usable with 1 or 2 cells out, but the LED won't light
> anymore and the number of shots to be taken per recharge gets smaller
> too.
It´s not so bad yet.
Paul wrote:
> and did come up with a couple
> of references to the fact that the nominal discharge rate of NiCd batteries
> should be on the order of 1%/day.
That´s what I experienced with my other NiCd cells, so the 15V pack acts
strange.
William Sommerwerck wrote:
> I've owned two of these, and both have gone bad in the same way -- a
> full charge will power many rolls of film, but the pack rapidly
> self-discharges.
Exactly what my pack does.
> I recently had NiMH cells put in my M.15V.
How long do they hold there charge unused? I´m asking, because
traveling, you might not have a chance to recharge the pack. Even if the
pack might be good for more than 40 rolls of film, does the charge last
for more than a month?
> Since NiMH cells have no
> memory (as far as I know), there is no excuse for not _briefly_ charging
> the pack after each use.
Memory effect was no problem with the other cells. I use an "inteligent"
charger for them, but not for the more expensive 15V pack, so the
problem of overcharging still persists.
Regards
Richard
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