1. Which battery will last the longest? My project is about if expensive battery will last the longest than other batteries. By: Jerry Ambelis

2. Materials Two D-size batteries from each brands: Duracell Energizer Eveready Rayovac Two other D-size batteries to test each flashlight and bulb before starting tests

3. What will Happen?? I hook up the batteries to a light bulb. I then kept track of the length of time each bulb stayed lit. Then it will turn on until it turn off

4. Hypothesis I think the Duracell battery will last the longest. I also believe that the more expensive the battery the longer it will last.