EMAX RUN TIME WITH FULLY CHARGED BATTERIES (2600MAH) WILL GO FOR ABOUT 13 MINUTES,I HAVE 2 EMAXS,TO BE HONEST THECONSTANT RECHARGING OF THE BATTERIES GETS OLD REAL QUICK,AND YOU STILL SHOULD LET THE MOTORS COOL DOWN BEFORE SLAPPING IN A FRESH SET OF BATTERIES,YOU WILL BE DISAPPOINTED AFTER BEING USED TO A NITRO TRUCK,THE ONLY COOL THING ABOUT THE EMAXS IS YOU CAN USE THEM INDOORS WHEN ITS TO COLD TO USE YOUR TMAX OUTDOORS.