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

Step 1: Ingredients

Picture of 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
Jayamidamaru7 months ago

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

argha halder (author)  Jayamidamaru7 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)  Jayamidamaru7 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?

hb081 year ago

will this work

argha halder (author)  hb081 year 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!1 year ago

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

argha halder (author)  probill1 year ago

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

thegeekkid12 years ago
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)  thegeekkid12 years 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
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.