i would discharge them again right before charging them just to equalize them... use the hold function to keep the batteries there for a few mins then throw them right on the charger at 1 amp... let sit and hit them at a 3 amp peak right before your race... you should get a nice amount of punch outta them if the batteries are still fresh... this will also keep the internal resistance down which equates to more punch as the power will get outta the cells faster...
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