How to make Potato Battery
You will need: 5 Potatoes, Small LED Lamp, Copper Wire, Galvanized Nails, Copper Nails, Knife and Pliers.
Use the Knife to cut the Potato in half.
Cut some wire with Pliers. You will need around 11 stripes of Wire.
Wrap one end of the wire around Galvanized (Zinc) Nail...
And other end around Copper Nail.
Put your Zinc nail in one Potato...
And the Copper nail in the second half of the potato.
Now connect 4 more Potatoes this way (8 potato halves).
Make sure that in each potato halve is 1 Zinc and 1 Copper nail.
And nails shouldn't be touching each other.
Let's see if it works with 4 potatoes.
Don't connect your first and last Potato half.
Instead, connect loose wires 
to your Lamp.
Make sure you connect right wires otherwise it won't work.
We added 2 more Potato halves to see if the lamp is brighter.
It is a little, but not much.
This is a 4,5 Volt lamp from ordinary Lighter.
It looks cool in the dark.
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