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Which Battery is best for Your Money? Introduction: For my experiment I chose to evaluate batteries to find out which type of battery last the longest. I will also find out which battery is best for your money. I am only conducting this experiment on AA batteries. In thin experiment I hope not to learn just what battery lasts the longest, but how they work also. When you look at most batteries they contain to sides to them. One side is called positive and the other negative. On AA batteries (What I am testing) these parts are called terminals. Electrons are what are in the battery. The electrons collect on the negative side to the battery. If you connected a wire from the negative terminal to the positive terminal of the battery then the electrons will travel from the negative side to the positive. (This is very dangerous if done on large batteries). This will make the battery run out of power very fast. You usually plug a battery in to a load. A load is a radio or light bulb or something you connect the battery into. For a battery to work you must have the negative terminal plugged into a positive one, thus making a chemical reaction to produce more electrons. If a battery is not conne