Well the 5.5 amp charge current you mention will work fine for all 3 of those cells, but you will need to play with the voltage thresholds for the NiMh & NiCd's(5mV per cell works fine for the 3300's & 3700's, but you might try starting at more like 12mV per cell for the 2400's, & if it doesn't feel like it warmed up much after that then you can try edging it up higher, you'll have to experiment a bit). And also I'd reccomend turning trickle charging off(maybe even for the NiCd pack), while it's not a big deal for the 2400's, the NiMh cells really HATE trickle charging after they've already been peaked(they'll overheat quickly if they're already charged & you put a trickle charge to them). As for anything else, you don't really need to worry about it(& you really don't need the NIMh 2 charge mode either, today's sub-C NiMh cells like the NiCd Linear charge mode quite well, same as NiCd's), & if you're confused on anything else or have trouble figuring out how to change things, you might stop by Novak's website(
www.teamnovak.com ), they may have the Millenium Pro's owners manual available to download....
