Flexi Says: It is possible to make a battery using lemon juice as the electrolyte. The battery can be made using a copper and a zinc electrode separated by the lemon juice. The zinc sheds electrons inside the lemon and the energy released from the chemical change provides the power. The power generated by a lemon battery can be obtained by multiplying the average current (I) of a lemon (0.001A) by the average voltage (V) of a lemon (0.7V) (P = VI = 0.0007 Watts). Therefore, it would take more than 6 million lemons to power an average 4320W car battery.