Instructables
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Picture of build a coin battery
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
 
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Step 1: Ingredients

Picture of ingredients
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.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

Picture of making the electrolyte
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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

Picture of making the electrolyte part 2
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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

Picture of making the electrolyte  part 3
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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

Picture of making the anode
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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
Jayamidamaru3 months ago

How many hours does this batter light's the LED? NEED AN ANSWER A.S.A>P

argha halder (author)  Jayamidamaru3 months ago

It depends, usually it should last you about 1 day and a half to full two days. But it would stay bright for the first 4-5 hours, then it would get dimmer and dimmer. When the light turns off, simply dip the battery in salt water again and soak out the excess water and it would be good to work again. To increase the lasting time of the battery, make sure to cover it in tape so that water does not evaporate... Good luck!!!

Would not small holes on aluminum foil? Affect the voltage since they are connect at series circuit

We will use this kind of experiment sir for our SIP :) Hope that it will work on us here in the philippines and It's our last proj that determining if we can pass or not :l. Any tips sir?

argha halder (author)  Jayamidamaru3 months ago

Good luck on your project! No need to call me sir, and some tips:

When you make that battery make sure the paper towels or cardboard that is soaked in salt water does not touch each other in the battery. Make sure its not too wet, otherwise the saltwater would run down the battery and mess up our output. But make sure again its not too dry, otherwise it won't work. If it does not light up with 4-5 cells, add more cells , and it should light up. And always try to present it nicely, make it look beautiful and when you're done don't forget to post the picture of the project!! Good luck!!

Sir it Light but not that bright and it only took secs before it dies. We used 6 coins, Wet tissue and aluminium foils. What tips can you give us to ENHANCE THE BRIGHTNESS AND LIFE SPAN of it?

hb089 months ago

will this work

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argha halder (author)  hb089 months ago

If you are trying to charge the phone with that, then it won't work because the voltage and current is not enough to charge the cell phone using this. But I am not quite sure what you are trying to do over there,, some details would help me understand what you are doing,, sorry for that...

probill made it!11 months ago

just made it.. at the begining it reached 0.63 V per cell !!
it was realy fun!

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argha halder (author)  probill11 months ago

Wow, good clean job, and by the way nice picture!

Can you electrocute your self doing this
This is not going to electricute you. It dosent have that much power. I found out a way to charge my Iphone 4 with it but it takes a long time but it still works.
nice innovative idea of charging i phone!
argha halder (author)  thegeekkid11 year ago
no never!sorry to be so serious!it is a small project that may create 3-5 volts which barely can electrocute you any way.so make it without any fear!
I like this project
thanks!!!!!!!!!!!
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hellohello hihihihihihihihiihihihihih!
This doesn't electricute you. Its safe to make this battery. I found out a way to charge my Iphone 4 with it but it takes a long time to charge but it still works.
This is Illegal in Britain don't know about the usoa but I think it will be.