We will be testing how temperature change affects the life of a disposable battery. We will be experimenting on Duracell, Energizer, and Eveready size AA.
For this experiment we put three batteries (one of each brand) in the refrigerator and we left the other three batteries out on a counter.
We left the batteries under these conditions for a total of 6 hours. We then removed the 3 batteries from the fridge.
We placed each brand of battery into 6 different flashlights. The room temperature batteries were placed in flashlights A, B, and C and the refrigerated batteries were placed in flashlights D, E, and F.
All of the flashlights were turned on at the same time. A timer was set to determine the length of time before the batteries die and the flashlights would no longer produce light.
Flashlight D, E, and F, which contained the refrigerated batteries proved to have a longer life than the room temperature batteries used in flashlight A, B, and C. Cold temperatures increase the internal resistance and lower the capacity. Higher temperatures improve performance, but will shorten the life of the battery.