Battery fits perfectly in erevo and summit. Over an hour of run time in summit and 40 mins in my erevo brushless. Tons of punch and even performance from top to bottom. I run lvc of 3.5 volts and the batteries typically charge 7000mah. I did a battery test running a 30a discharge to 3.0v/c and it drained 8150mah and recharged 8200mah. The batteries have an accurate rating.