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All Worn Out!

Experiment #4 from Investigating Voltage

Education Level
Elementary School


Have you ever wondered why some flashlights use small batteries and some use big ones? What difference does it make? Do larger batteries make the light brighter? Will the size of the battery make a difference in how long the flashlight will stay bright or is the battery chosen for some other reason?


  • Measure the voltage of batteries as they discharge.
  • Predict how different size batteries will behave when being discharged.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

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This experiment is #4 of Investigating Voltage. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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