The greatest likelihood, if you're using NiMH batteries, is that they are unable to sustain the power demanded by the transfer consistently. NiMH batteries seem to be best at modest duration bursts on power delivery. Pentax
I don't know if this is it, but I'd just like to add that the quality of the charger you use on the NiMH makes a *huge* difference in their response. I had a trickle charger and was always careful to match them pairwise in both discharge and charge. Since I bought the LaCrosse BC-900 and ran them all through a diagnostic cycle, I could see how horribly mismatched they were. One will be close to dead, and the other close to full... both alegedly equal.
I know it's helped me match equivalent batteries for time-lapse photos. I still have to finish my homebrew AC adapter... :)
-Cory -- ************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
