Watch on YouTube
(Embed)
38,137
1,460
Genre: Science & Technology
License: Standard YouTube license
Family friendly? Yes
Shared June 10, 2026
I Lit an LED with 2 Lemons! 🍋 0.338mA Real Current Measured
Description:
100% REAL lemon battery — no hidden wires!
Using magnesium + copper electrodes in 2 lemons, I generated 3.35V and 0.338mA of current. That's enough to light this green LED bright!
Why it works:
Lemon juice = citric acid electrolyte
Magnesium oxidizes and releases electrons → negative terminal
Copper collects electrons → positive terminal
Mg-Cu gives ∼1.6V per lemon. Two in series = 3.35V measured
Most people use zinc and only get 0.9V per lemon. That's why theirs don't work with white/green LEDs.
My multimeter proves it: 0.338mA on the 2mA scale while the LED is glowing.
The magnesium strip gets consumed during the reaction. Once it's gone, the battery dies. So it's real chemistry, not free energy. But still awesome!
Materials:
2x Lemons
Magnesium strip
Copper wire
5mm Green LED
Try it and show me your results!
#ScienceExperiment #LemonBattery #DIYElectronics #Physics #STEM
--
