OK, after a lot of playing with it, I figured this out. The last time I charged this 3300 batt my 0610i was still running v1.5 firmware. When I tried charging my orig 3300 batt tonight using v1.6 - it wouldn't charge/balance either when it had before. I charged a FP 1600 3S with no prob and a couple of 2S lipos of diff capacity and balance tap types. Ok so what's the diff here? The tx batts use a male servo end - I was using my Ice charger's adapter for this and its 18" long and servo gauge - thin stuff, prob 18 or smaller - these are tx batts and only need charging at 1amps.

I cut a short piece of servo lead and used alligator clamp 14 ga leads and it worked like a champ - charge and balance at same time. I noticed the IR indiacted by charger dropped from 379 to 137mohmm. I suspect v1.6 senses this and limits the voltage drop for the main output leads. v1.5 didn't do this since it had let me charge my 1st 3S 3300.

Bottom line - charges and balances again like its supposed to. Just had to understand what was going on to get it there.