(I'm cross-posting this to the electric forum. Way too many forums here, and I might get good advice there, too.)

I have the Hobbico Accu-Charger Elite. This is a nice charger, and I like that it gives me a lot of info about the batteries. (How much energy it took to charge, the amount of capacity on discharge, and charging rates.)

But I'm having a problem: When I try to charge higher-capacity NiMh packs, it seems to never complete the charge. For example, the battery in my glow stick is a 3400mAh sub-c cell, and when I charge it at a modest rate of around 350mA, the charger never peaks - even after pumping 5000mAh in to the cell! My 4 cell 1600mAh NiMh flight pack does the same thing.

I'm pretty sure the charger is working right; it has no problems with the 900mAh batteries I use in my Easy Star, and the 600mAh NiCd packs that came with my transmitter and receiver seem to work fine. It's just these high-capacity NiMh packs that won't peak.

Do I need to change how they're charging? More current? Adjust the peak detection? (it will go from 2mv up to 10mv, I think. The default is 8mv) I want these batteries to peak and not overcharge, and I prefer keeping the charging rates low - but if they never peak out, I'm thinking that I'm doing something wrong.

Any ideas?