How about you’d build your own watch,without using any traditional batteries? All you need are lemons and a little bit of technical skills. This “bio-watch” only needs one lemon in one week. Since you can’t buy this watch yet you have to make it yourself and, in my opinion, it looks pretty good. :) Finally it can pay off that you payed attention during physics and chemistry class once in a while. ;-)
You can watch how to make lemon-batteries in the video below:
And all who prefer reading than watching – here’s the construction manual as a text.
