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The Tiny Lemon Battery (and more than 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 mines. They use 4 DROPS of lemon juice. The lightest weights 0.76g. They light 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 4 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 (in less than 10 minutes) the Design 1 and 4, with materials you have around house and zero cost. A little step toward a greener planet if you use this instead of buying a battery to light a led or as an emergency flashlight ;) Finally, we will see other 10 different designs for making a battery out of ordinary materials. If you will like this instructable, please vote it! It is in the Epilog Contest...

The Tiny Lemon Battery (and more than 10 designs for a zero cost battery)

The Tiny Lemon Battery (and more than 10 designs for a zero cost battery)

The Tiny Lemon Battery (and more than 10 designs for a zero cost battery)

The Tiny Lemon Battery (and more than 10 designs for a zero cost battery)

The Tiny Lemon Battery (and more than 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 5The Flower Lemon battery

This can also be a very original gift. Give it to your special one, bring her and the flower in quite darkness, then give her half a lemon (or lemon juice in a nice tiny c…

step 6Other designs_1: The Long Lasting

Here we make a battery trying to maximize duration and portability, that is quite solid too. Also good looking and green ;) Materials: Each cell is contained in thes…

step 7Other designs_2: The straw battery

Basically, each cell is made up of a spiral of copper wire, another spiral of zinc-plated iron wire, inside a transparent straw filled with hand dish washing liquid, and se…

step 8Other designs_3: The futuristic lemon battery

Similar design as the previous one. The strange circular plastic item is a connector that you find in the box of light sticks ( 2 of them are included so you can make a sp…

step 9Other designs_4: The RCA lemon battery

Similar to the straw battery, but here instead of the copper we use the gold plated connectors from an unused gold-plated RCA plug. With 5 of them in series we have a qu…

step 10Other designs_5: The almost AA battery

Here is my first attempt at making an AA battery, using only copper and zinc-plated iron wire. Even if it does not meet the specifications of an AA battey, it was quite go…

step 11Other designs_6: The (better) almost AA LB

A better design, still not powerful as an alcaline AA battery, but with a lot of space for improvement. More detail about the making steps is coming...

step 12Other designs_7: The Palugraph lemon battery

The Paper Aluminium Graphite battery One of the simplest battery that you can make with common household items in less than a minute. Extremely light and thin, but wil…

step 13Other designs_8: The CPA lemon battery

A quite simpe design: a stack of copper foil - paper - aluminium foil, with a drop of hand dish washing liquid.

step 14Other designs_9: The ultra-thin Lemon Battery

A nice design for an ultra-thin battery. Try making an armlet connecting 5-6 of them and a led in series ;)

step 15Other designs_10: The rechargeable hydrogen battery

The rechargeable hydrogen battery (or the ultra basic fuel cell) Materials: -Transparent Straw, about 3 com long -Small rods of activated carbon for aquarium -Some wi…

step 16Final considerations

Here you have seen many different designs for making a battery out of ordinary materials. Some designs are at the moment explained better than others, I will update th…

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/