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Effect of extreme temperature on battery life Featured science projectScience project video

Conclusion

The hypothesis that a battery will supply power for a shorter length of time when its temperature falls, is proven to be true.

Batteries are used to operate small portable electrical devices like  watches, calculators, torch lights, cell phones and many more. They are also very useful  for use in remote areas without wired electricity or when we experience power disruptions at home. Understanding how batteries perform under different temperature conditions helps us properly plan for our power requirements.

Also consider

What would happen if this science fair project were to be repeated at higher temperatures of 40°C, 50°C, 60°C, instead

The experiment can also be repeated  using rechargeable batteries, such as Nickel Metah Hydride batteries commonly used in mobile phones and cameras.
 

References

Battery Electricity - http://en.wikipedia.org/wiki/Battery_ (electricity)

Temperature affects batteries - http://www.batteryeducation.com/2006/08/temperature_aff.html
 

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Complexity level:
6
Project cost ($):
40
Time required:
2 hour to prepare, 1 day for observation
Material availability:
Easily found at a hobby store. Access to a laboratory is required
Safety concerns:

Proper precautions must be taken when handling dry ice.
1.    Avoid direct contact with skin or eyes. Wear a lab coat, goggles and thick gloves.
2.    Do not store dry ice in air tight containers.
3.    Perform experiment in a well ventilated area.