The purpose of this experiment was to determine which fruits or vegetables work the best at making batteries. To carry out this experiment, fifteen fruit and vegetable batteries were made, three for each kind of five fruits and vegetables. For this, lemons, grapefruit, tomatoes, kiwi, and potatoes were used. In each fruit, two slits were cut into it in which a hot galvanized nail and a clean, new penny were placed. This circuit was connected by a multimeter that showed the voltage. The voltage of each battery was measured in Volts DC, using the VDC 20 range that was recorded and then averaged.

In this experiment, it was found that the grapefruit batteries work the best. It had the highest voltage (0.91 volts). Tomatoes were the next best (0.85 volts). Lemons had the third highest voltage (0.81 volts); they were very close to the tomatoes. Kiwis were the fourth highest (0.78 volts). Potatoes had the least voltage of the fruit or vegetables tested (0.64 volts), but worked better than distilled water with no detectable voltage.