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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 18 pack of AA Duracell batteries 28 pack of AA Energizer batteries 3A hand held battery operated fan 4Single cell flashlight 5Flip over toy dog 6Voltmeter tester 1Take check the voltage in each of the batteries3Put the batteries in a chosen device to test 4Run the device for a set amount of timeNote 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 out5When the time is up check the voltage of each battery and record it in the log book 6Keep doing this process until batteries are dead and the device stops working 7Repeat 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 95 hours since it was not useable and you could hardly see a few feet in front of you At 98 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 25 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
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