In this age of ubiquitous electronics, batteries have an astounding importance in our everyday lives. As we buy and use different brands, we come to wonder, "Which of these is actually the best? Is it worth it to go for a big name brand?" To answer these questions, I set up an experiment to test the endurance of four different battery brands: Duracell, Energizer, Rayovac, and Sunbeam(a dollar store brand).
Step 1: The Materials and The Hypothesis
To test the comparative endurance of the four battery brands under study, I used four Mini Maglite xenon lamp flashlights purchased from Walmart on the same day. As for batteries, I bought an eight pack of Energizer AA batteries, an eight pack of Rayovac AA batteries, and a four pack of Sunbeam dollar store AA batteries. The flashlights came with Duracell, so I used those batteries for the Duracell test. I did, however, find a price for a Duracell eight pack in order to compare prices more effectively in the conclusion.
My hypothesis was as follows: Dollar store batteries will be the first to go, with one of the bigger name brands coming out on top. I had no basis for distinguishing between the three top brands, but because the Duracells came with the flashlights, indicating that they might be preferable, I hypothesized that Duracell would last the longest.
Step 2: The Setup
To carry out the actual test, I prepared an apparatus that would hold the flashlights parallel to one another, all shining on one piece of cardboard so their relative intensities could be observed. I put two Sunbeam batteries in the top light, two Duracells in the second, two Energizers in the third, and two Rayovacs in the fourth.
Step 3: Starting the Test
To start the flashlights, I went from top to bottom, twisting the top of each light until the exact point at which the light turned on (the flashlights were turn-top instead of push-button. Button flashlights may be more useful in future experiments). In all, going from Sunbeam to Duracell to Energizer to Rayovac took 13 seconds.