These durable plastic holders come in either a one, two, three, or four AA-battery holder.
If you use the one-battery holder, the output will be 1.5 volts. If you use the two-battery holder, the output will be 3 volts. The three-battery holder puts out 4.5 volts and the four-battery holder output will be 6 volts. If necessary, these can be used on a cloudy day to test your Junior Solar Sprint cars. Just hook up the batteries and test your solar vehicle without the Sun!