According to my experiments, the Energizer maintained its voltage (dependent variable) for approximately a 3% longer period of time (independent variable) than Duracell in a low current drain device. For a medium drain device, the Energizer maintained its voltage for approximately 10% longer than Duracell. For a high drain device, the Energizer maintained its voltage for approximately 29% longer than Duracell. Basically, the Energizer performs with increasing superiority, the higher the current drain of the device.
The heavy-duty non-alkaline batteries do not maintain their voltage as long as either alkaline battery at any level of current drain.
My hypothesis was that Energizer would last the longest in all of the devices tested. My results do support my hypothesis.
I think the tests I did went smoothly and I had no problems, except for the fact that the batteries recover some of their voltage if they are not running in something. Therefore, I had to take the measurements quickly.
An interesting future study might involve testing the batteries at different temperatures to simulate actual usage in very cold or very hot conditions.
Support for Science Buddies provided by:
Recent research on cold-water immersion incidents has provided a more complete understanding of the physiological processes occurring during drowning and near-drowning accidents. Current findings suggest that the cooperative effect of the mammalian diving reflex and hypothermia plays a critical role in patient survival during a cold-water immersion incident. However, the relationship between the two processes is still unclear. Because it is impossible to provide an exact reproduction of a particular drowning incident within the laboratory, research is hampered by the lack of complete details surrounding drowning incidents. Consequently, it is difficult for comparisons to be drawn between published case studies.
More complete and accurate documentation of cold-water immersion incidents-- including time of submersion; time of recovery; and a profile of the victim including age, sex, physical condition--will facilitate easier comparison of individual situations and lead to a more complete knowledge of the processes affecting long-term survival rates for drowning victims. Once we have a clearer understanding of the relationship between hypothermia and the mammalian diving reflex, and of the effect of such factors as the age of the victim, physicians and rescue personnel can take steps to improve patient care both at the scene and in the hospital.