I am looking to make a basic heating element 1" x 1" square that utilizes at max 4 AA batteries. Then problem I am having is that I have very little electrical knowledge. I am a Civil Engineering student and circuits is not part of our degree plan. When I connect the series the element heats up properly but the batteries become really really hot. I am wondering how I go about reducing the power flow back to the batteries so that the element remains warm but the batteries stay cool. I am curious as to if a resistor between the coil and the (-) will work.