Battery Life at Extreme Temperatures

Hard

How does extreme cold affect how long a battery lasts? You test three brands of AA batteries at three temperatures: - Room temperature (24 degrees C) - Freezing (0 degrees C, using ice cubes) - Extreme cold (-78 degrees C, using dry ice) Each battery powers a small table fan. You time how long the fan runs before the battery dies. Comparing the results across temperatures and brands reveals which batteries hold up best in harsh conditions.

Hypothesis

The hypothesis is that batteries will supply power for a shorter length of time when temperatures fall.

Science Concepts Learned

Temperature

Temperature measures how hot or cold something is, and extreme differences can change how devices perform. Batteries tested at room temperature (24°C), freezing (0°C), and extreme cold (-78°C) last very different amounts of time. Comparing results across temperatures and brands reveals which batteries hold up best in harsh conditions.

Battery

A battery stores energy through internal chemical reactions, and temperature changes how fast those reactions run. When the reaction slows, the battery powers a device for less time. You test three brands of AA batteries — Energizer, Duracell, and Eveready — at room temperature (24°C), freezing (0°C with ice cubes), and extreme cold (-78°C with dry ice). Each battery is sealed in a plastic bag with jumper wires, placed in a beaker at the target temperature, then connected to a small table fan. You time how long the fan runs before the battery dies. Comparing results across temperatures and brands reveals which batteries hold up best in harsh conditions.

Method & Materials

You will test the performance of batteries at different temperatures, -78°C, 0°C, and 24°C. You will place the battery in a plastic bag with jumper wires, and place it in a beaker with either dry ice or ice cubes. Then, you will connect the fan to the wires and time how long it takes for the battery to run out of power.

You will need 3 Energizer, 3 Duracell, and 3 Eveready AA size batteries, 6 plastic bags, 6 rubber bands, a battery holder, 2 jumper wires with crocodile clips, a AA battery-operated table fan, 2 beakers, 1 kg of dry ice, 1 kg of ice cubes, safety goggles, and a clock.

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Results

The results showed that the maximum operation time of the batteries became shorter as the temperature fell. At a temperature of -78°C, the batteries only lasted a few minutes.

Why do this project?

This science project is interesting because it explores how temperature affects the life of a battery, which is an important factor to consider when using batteries in different environments.

Also Consider

Consider repeating the experiment at higher temperatures of 40°C, 50°C, and 60°C. Also, try using rechargeable batteries, such as Nickel Metal Hydride batteries.