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The tiny Lemon Battery (and other 10 designs for a zero cost battery)



Hi, you probably already know about lemon batteries or bio-batteries. These usually use 3-4 lemons to barely light up a led. Good designed ones use just 1 lemon. I'd like to show you mine. It uses 4 DROPS of lemon juice. Weights 0.85g. Lights up a 3.5v, 35mA white Led for 1 hour. After 1 hours (more or less depending on climate) the lemon juice evaporates. It is like a natural timer. If you want more light, just put another 5 drops of lemon juice. You can re-use it for many, many times before oxidizing makes it unusable. Well, let's see how to do it (in less than 10 minutes), with materials you have around house and zero cost. A little step toward a greener planet if you use this instead of buiyng a battery to light a led or as an emergency flashlight ;)

The tiny Lemon Battery (and other 10 designs for a zero cost battery)

The tiny Lemon Battery (and other 10 designs for a zero cost battery)

The tiny Lemon Battery (and other 10 designs for a zero cost battery)

The tiny Lemon Battery (and other 10 designs for a zero cost battery)

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step 1Materials

'''Very basic materials you will need, you should have more or less all of them around house and you can use pieces that would have been wasted otherwise, like a lemon cut …

step 2How it works

This battery is a zinc-copper battery. Searching with google or wikipedia will give you exact explanation of the electrochemical reactions involved, but here, we'll just se…

step 3How to make the cells

Cut about 1.5 cm of Iron wire. Take one paper facial tissue and carefully extract one of the 3 or 4 layers that compose the tissue. (The thinner, the better). Cut a a re…

step 4Done!

Solder the 4 cell in series to the led, respecting polarity according to the scheme. Put 1 drop of lemon juice on each cell. And voila', enjoy one hour of free light …

step 5Other designs_1: The Long Lasting

Here are some considerations about this battery design: -wire the copper strands very close together for better results; -if you enclose the whole battery to reduce eva…

step 6Other designs_2: The straw battery

step 7

Via Instructables, Published: 2009.03.31


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http://www.instructables.com/id/The_micro_Lemon_Battery_reusable_1_hour_of_led_l/