Effect of temperature on battery life
The hypothesis that batteries will last the longest at around room temperature (about 26°C) is not proven to be true. We hypothesized that the performance of batteries will be affected by changing temperatures but in this experiment the differences in the temperature was perhaps too small to observe the changes.
Batteries are used to operate small portable devices like torch lights, watches and cameras. They help to operate small devices in places where electricity supply is not available.. However, the disposal of the batteries is a problem because they contain chemicals that are not environmentally-friendly.
What would happen if the experiment were to be repeated at a larger range of different temperatures from 0°C to 80°C?
The experiment can also be repeated by using rechargeable batteries.
Source for Overview:
Battery Electricity - http://en.wikipedia.org/wiki/Battery_ (electricity)
Temperature affects batteries - http://www.batteryeducation.com/2006/08/temperature_aff.html