Batteries will last longer at around room temperature (about 26°C). We hypothesise that manufacturers would design their batteries to perform optimally at room temperature, since most batteries would be used by consumers, in environments at room temperature.
Batteries are devices that convert stored chemical energy in the battery into electrical energy when its terminals are connected. Batteries consist of rechargeable and disposable types. They can be found in various sizes and voltages.
Batteries consist of 2 electrodes (an anode which is negative and a cathode which is positive) and the electrolyte. The two electrodes do not have a physical connection but are electrically connected through the electrolyte. When the battery terminals are connected, a chemical process occurs in the electrolyte where electrons will be received from the anode and supplied to the cathode.
The performance of a battery depends on humidity and temperature. This is because the battery produces electricity through a chemical process. As the temperature becomes lower, the chemical reaction slows down and a smaller current is produced but the battery is able to last longer. As the temperature increases, the chemical reaction becomes faster and more current is produced but the life of the battery shortens.