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)
7)some salt(if you have vinegar ignore salt and water)
8)a bowl of water(not shown in the picture
<p>How many hours does this batter light's the LED? NEED AN ANSWER A.S.A&gt;P</p>
<p>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!!!</p>
Would not small holes on aluminum foil? Affect the voltage since they are connect at series circuit
<p>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?</p>
<p>Good luck on your project! No need to call me sir, and some tips:</p><p>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!!</p>
<p>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?</p>
<p>will this work</p>
<p>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...</p>
<p>just made it.. at the begining it reached 0.63 V per cell !!<br>it was realy fun!</p>
<p>Wow, good clean job, and by the way nice picture! </p>
Can you electrocute your self doing this<br/>
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! <br>
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!!!!!!!!!!! <br>
hihihihihhihihihhihihihihhihhihhihhihihi <br>hellohellohellohelohellohellohellohellohello
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.
<p>youre an idiot why would this be illegal</p>

About This Instructable


48 favorites


Bio: I love making and breaking electronics.
More by argha halder: How to make a speaker Wireless electricity transmission circuit Reusing Dead Electric Lighters for fun!
Tags: coin battery
Add instructable to: