The ted talk
Many people use a outlet (Some people also use battery on the road) to charge their electrical things like a iPad and iPhone but what if you need to use your iPhone but you didn't have a battery or outlet on hand. You could use a potato to charge your iPad (The only downfall is that you need three potato to charge a phone because one potato is too small). People would probably say that it is impossible but a potato does have a element that can produce electricity. That thing is called potassium. That's why many household things like a potato and a banana can charge iPhones, iPads, and other electrical things. If you want to know how many volts I got the answer is 0.52 volts.
So that is my ted talk and it will probably charge very soon when I get better idea to write about or that I need to edit something.