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I expect the results to be very close between the two brands of batteries because both advertise to last the longest. But I just have a feeling that the Duracell batteries will last longer in the products I have chosen. 1. 8 pack of AA Duracell batteries 2. 8 pack of AA Energizer batteries 3. A hand held battery operated fan 4. Single cell flashlight 5. Flip over toy dog 6. Voltmeter tester 1.
Take check the voltage in each of the batteries. 3. Put the batteries in a chosen device to test. 4. Run the device for a set amount of time. Note: The amount of time varies depending on the device.
Some devices use more energy than others. I wanted to be able to check the batteries several times before it ran out. 5. When the time is up, check the voltage of each battery and record it in the log book. 6. Keep doing this process until batteries are dead and the device stops working. 7. Repeat the same test for the other brand of batteries. amount of electricity left in batteries The Duracell batteries lasted 4 minutes longer than the Energizer batteries.
The batteries in the fan did not last as long as in the other objects. The fan uses more power. I noticed that the fan would not last long because the voltage dropped quickly in the voltage check. [graph of results] The Duracell battery lasted 15 minutes longer. On the Energizer I decided to turn it off after 9. 5 hours, since it was not useable and you could hardly see a few feet in front of you.
At 9. 8 hours the Duracell battery was completely dead. Because I did not let both batteries go dead, I think Duracell was the stronger battery because it consistently had a higher voltage. [graph of results] The dog broke after 2. 5 hours on my second test. Since I could not finish the test, I compared from when it broke to the other test at the same time. At that point the Duracell batteries had slightly more voltage then Energizer. It was so close I think they worked the same. [graph of results] All of the tests were close. All the tests ranged between 4 to 15 minutes in difference.
I proved my hypothesis that Duracell batteries last longer then Energizer batteries. One reason for Duracell beating Energizer is that when I first put the batteries in, Duracell had a little more voltage. I also learned that if you take the batteries out and them rest they will gain back a little bit of voltage. If you are looking to buy batteries choose Duracell. 4. A hand held battery operated fan can get it from Wal Mart or K-Mart Bibliography:
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