散裝電 always have a risk ga la
especially ones in Ap Liu,
they are left overs from 1st match(factory, best match already sold to big brand for real racer) and 2nd match (big brand match to sell on street) and 3rd match (factory stick batteries) and 4rd match(RC shops matched for themselves) and 5th match (RC shops sell to users) and so on...
and actually
Ap Liu Street is not cheap anyway
just get batteries in RC shops la
if there is a problem you can go back and xxxx them ah ma
and I dunno about ICE charger
maybe your cycle function has setting on top mAh and min mAh (I think my Muchmore has this function)
maybe try to manually discharge, and charge with lower A(say 1A) and let it charge a whole day and see
and your question about the extra 600mAh, there is a chance that it wasnt even charged into the batteries and became heat
there is also a chance that these batteries are already half dead cos of improper storage...(humidity, low voltage, left too long and didnt get charged... too many reasons)