let me throw in a curved ball for reference only... -dV is not a great termination technique for NiMH as the cells are in overcharge when the termination occurs. Most professional charge systems use dt/DT as the primary charge termination technique for fast charging. -dV, Max T, Max mAh, Max t and Max V are redundant back-ups. The lower the -dV threhold the less damage you will do, so unless you have your cells bought for you by someone other than father Xmas, keep that -dV level low and protect your investment. The biggest issue really is that the cells diverege so much over time that they dont all reach top of charge at the same time, so some get overcharged more while others never reach top of charge. this leads to greater imbalance in the pack for the reasons I have described in my previous rant. One thing I did not mention is charge rate, I try to keep to 4A maximum. charging at rates higher than this may make you wheelie off the line and hit the guy in front of you, but it does nothing for the cell life... and at an hour a round you dont need to be silly with charge currents.
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