Image of How to light your room up for weeks using a single potato (must-watch video)

How to light your room up for weeks using a single potato (must-watch video)


Potatoes are one of the most sustainable and versatile foods known to man. We fry it, mash it, boil it, roast it, scallop it. We eat it with meat, ketchup, cheese, gravy, and any spice in the pantry. Besides  providing our bodies with energy, the Hebrew University of Jerusalem has discovered it can also energize our homes.

It has the power. 

The Potato Rediscovered

Organic vegetables. Farmers hands with freshly harvested vegetables. Fresh bio potatoes ** Note: Shallow depth of field

Potatoes are eaten everywhere as they are the world’s fourth most abundant crop. Their fields can endure varying condition. They are cheap, filling, and can be stored for months without attracting insects. Because of these features, poverty-stricken homes and villages in a third-world country rely on them for nourishment. (1)

Being the humble vegetable that it is, the potato is willing to give us more.

Energy from the Spud

In the laboratory of Hebrew University of Jerusalem, Haim Rabinowitch and his team tested potatoes to source lighting, telecommunication, and information transfer electrically. To sum it all up, it’s like a battery, but tastier, more durable, and 50 times cheaper than the retail 1.5 V AA batteries. Plus it is a lot more environmental-friendly.

The researchers found that boiling the potato improved the generation of the energy ten times more than a raw spud. The scientists express how they hope that their discovery can solve the low power energy lackings in poorer areas of the world that are without access to electrical infrastructure. (2)

The Method

After experimenting with different cuts of potatoes, Rabinovitch found that chopping the vegetable in quarters produced the best results. He placed a copper cathode and a zinc anode, both connected to a wire, into the boiled quarter. It’s as easy as that.

To clarify, the potato itself is not an energy source. It is simply the conductor of electricity, allowing the current to move freely across the wire to create energy. It’s a natural version of battery acid. Boiling the spud breaks down the resistance in the starchy flesh so the electrons can flow more freely. This empowers the overall electrical output.


Rabinovitch also devised a potato battery kit that includes two metal electrodes and alligator clips. Its design enables a newly boiled potato quarter to easily replace the dried up processor. The alligator clips transport the electrical current to the electrodes, and to the positive and negative input points of the lightbulb. (3)

Insert lame ‘how many potatoes does it take to change a lightbulb’ joke here.

DIY Potato Battery

Battery of potato - a practical idea for''green energy''practicable

You will need:

  • 1 zinc nail

  • 1 copper nail or 1 penny

  • 1 potato

  • 1 wire

  1. Stick the nails on opposite sides of the potato. If you are using a penny, you may need to cut out a penny-sized hole to be able to place the coin halfway into the potato.

  2. Attach the clips (or wrap around one end of the wire) onto each nail. If you are using a penny, wrap the wire around the coin before inserting it into the potato.

  3. Repeat this process to create more energy! Connect the potatoes by attaching one end of the wire to a zinc nail and the other end to the copper on the next potato, and continue this until all the studs are linked.

  4. Power up! Try this with a lightbulb or another appliance for environment-friendly energy source! (4)

Note: Do not eat the potatoes afterwards!