Lemon batteries have never really been more than a curiosity of science fairs and kids’ home invention kits. They’re cool, but who wants to carry around three lemons to light up an LED?

The projects in the Instructable below by madeaon might not make the lemon battery as useful as a button cell, but it does get it down to around the same size, and provides some great inspiration to the DIYer. Plus, these things are practically works of art. According to the author, the more simple designs can power an LED for about an hour on a drop or two of lemon juice (and can be recharged with more lemon juice), while some of the larger batteries can provide power for a month and a half using dishwashing soap as an electrolyte. Check out the instructable for several creative battery designs, including a neat little hydrogen battery.


The Tiny Lemon Battery, and other designs for zero cost electricity and led light without batteries - More DIY How To Projects