Solid dual peak charger for NiMH -
http://www3.towerhobbies.com/cgi-bin...&I=LXTCK2&P=ML
Charger will tell you when the batts peak by signaling the end of charge process - usually with audible tone or melody.
Haven't seen anything mentioned on the Summit about probs, but there hasn't been a lot of feedback on them either. Guess they are still a little new.