Also, check your firmware level. Mine originally did this almost everytime, and once they released the new firmware, it wasnt nearly as sensitive to out of balance cells. There is a thread in the general electric section on the hyperion firmware update.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES