battery getting drained while driving

Yes 14.7 amps at battery.Had the battery load tested at auto zone. they ues a strange looking tool that has large coils on it that heat up as the test is run.It passed the test.I could take the new optama red top out off my jeep and try it,but had to be towed home after my last outing in the car.I am a little scared and down on cash for another tow charge.