Knowledge is Power: Observing Temperature’s Impact On Alkali Battery Depreciation
Harry Jiang
Alpha Secondary
Floor Location : M 019 E

Every year, billions of batteries are wasted, wasting us billions of dollars, and damaging our precious environment. The goal of my project is to drop that number as much as possible. For my project, I tested the influence that temperature has on battery depreciation (charge lost). My hypothesis is that batteries stored in a -5 °C to 5 °C environment will experience the least depreciation over the testing period. In my experiment, I placed a large sample of AA, AAA and 9 volt batteries in temperature ranges of: less than -5°C, -5°C to 5°C, 5°C to 15°C, 15°C to 25°C, and 25°C+, making sure they were all in controlled environments. Throughout the one and a half months that I ran the experiment, I measured the battery voltages every three days, which I later converted into charge lost. The end results showed that there was a clear trend: batteries stored in colder environments lost less charge than those stored in warmer environments. However, batteries stored in the extreme temperature environments (below -5°C, and above 25°C) showed physical damaged, which ended up largely hindered its physical performance. Once equipped with this knowledge people all around the world will be able to help save money, energy, and the environment.