What Battery Lasts the Longest?
Manufacturers of batteries usually claim that their product will last longer. Most of us do not have a scheduled use of batteries, so we can not really be sure which battery lasts longer or which battery is the best buy based on its durability and price. But the batteries can be tested and that is the subject of this science project.

 Material and step by step instructions:
Apply equal loads on four different batteries to see which one will last longer. Record your data in a table and draw a chart. Analyze the results and make a report. Answer some related questions such as:

Does the price have anything to do with battery life?

What was the maximum battery life in your tests? (how many hours?)

Details of this project
More details of this project are available in the members section of ScienceProject.com web site. Since research on this subject has a long history, you might also be able to find good books about it in your local library or find some information on the internet.