how old are they? if they are only getting about 2500mah into them then there is certainly something either wrong with your charger (ive heard also that the mrc chargers false peak) or else there is something wrong with your pack. Also why are you using the mrc over the ice? imo the ice would be a better charger?
Kyosho STRR / OS Speed
Mugen MTX-4R / RB Speedline Matrix
Jammin CRT.5 / Sirio STI