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Question
Which AA battery maintains its voltage for the longest period of time in low, medium, and high current drain devices?
Variables
Independent Variable: Time, how long each battery operates.
Dependent Variable: Voltage.
| Experimental Group | Controlled Variables for Each Group |
| Low current drain | Same portable CD player Play the same music track Play at the same volume level |
| Medium current drain | Identical flashlight Identical light bulb |
| High current drain | Same camera flash |
| All groups | Battery size (AA) Constant temperature (A battery works better at a warm temperature.) |
Hypothesis
Hypothesis: As I test for increasingly long periods of time, the Energizer AA battery will maintain a higher voltage than other batteries.
