Originally posted by antoniop
Ok,
That's easy explained. If you discharge a pack after a run at 30 or 20 amps with cut off at 5.4, what happens is that the voltage depression caused by the high discharge current will almost immediatly bring the pck down and the charger will cutt discharge......
I'll second this explanation, except for one detail; The above aint a voltage depression, but simply a result of the law of Ohm; The higher the current is, the larger the voltage drop is over the resistor. In this case, it's the internal resistance in the pack, which cause the voltage drop.
A voltage depression, is what happens when NiCd's and NiMh aint handled properly. Probably the most common is, when the cells aint totally dischargerd once in a while, followed up by a full charge. This happens every day in toothbrushes, shavers, celluar phones, you name it.... Usually it's called "the memory effect", but it aint, it's just a voltage depression. There's only one true example of the memory effect, and that was once upon a time in a sattelite going around and around in the same cycle. That is, the excat same partial charge, partial discharge, partial.... Once the cycle was broken, the cells didnt deliver the full capasity.