what can you buy with a coin?many things like aa batteries,aaa batteries ,button coins etc etc.but can you make a battery with the coin itself?no?then i am here to share how to make it.it is a small project no soldering no hazards and the best thing it can be build in 15 minutes .excited?so lets start

Step 1: Ingredients

.for this you will need
1)few copper pennies
2)a piece of alluminium foil
3)a piece of wet tissue or card board
4)a piece of led(for just testing the battery)
5)scissors
6)pencil(optional)
7)some salt(if you have vinegar ignore salt and water)
8)a bowl of water(not shown in the picture

Step 2: Which Coins to Be Used?

we will be using copper coins.the coins of USA that are worth 1/100 of a dollar that is a cent is to be used.any copper penny would work.but the ones that are made in usa should be after 1982.

Step 3: Basic Design

here in this project we will use copper coins as positive charge extracting part and some alluminium foils for negative charge and a wet tissue soaked in saltwater for the electrolyte

Step 4: Making the Electrolyte

so lets start the making.first take the paper towel or wet tissue or cardboard and then put the coin on it.now draw its outline.now cut it from the wet tissue.
IF YOU HAVE VINEGAR THEN SKIP THE NEXT STEP

Step 5: Making the Electrolyte Part 2

now take a bowl of water and mix 2-3 spoons of salt(adding more salt increases the performance of battery)KEEP mixing until they dissolve

Step 6: Making the Electrolyte Part 3

now take the piece of wet tissue that we cut earlier, and dip it into the solution of water and salt or in vinegar.then take it out after 2 minutes.soak out the excess water from the wet tissue.

Step 7: Making the Anode

now lets make the anode which which will make negative charge.first take the aluminium foil and put the coin on it.take its out line and cut it out.

the cathode is the coin which is ready made

Step 8: Lets Put the Cell Together

now lets join the cell together.

First put the salt water or vinegar soaked tissue or cardboard on the piece of aluminium foil.

then put the coin on top of the cardboard or wet tissue. Its ready!
test it with a volt metre.it will give almost 0.5 volts.
take care that the aluminium foil and the coin is not touching each other or the cell wont work!

Step 9: Lets Make Many!

how about powering a led with it!leds work at 3 volts normally.so lets make 6 of it.take the wet tissues and alluminium foils and cut many pieces

Step 10: Lets Complete the Cells!

now take the aluminium foil ,put it on the floor then put the tissue or cardboard and then the coins.

Step 11: Lets Gather All Cells Together!

firstly put a cell on the floor and then put the other cell on it so that the alluminium foil on the top cell is touching the coin of the first cell.now in this way pack the whole thing. see that the electrolyte of one cell is not touching the parts of other cell.