Originally Posted by ckaplan
Try to power your laptop with a potato battery. I bet if you had enough of them in series you could get it to work. Actually you don't have to go that far. You could just make one potato battery and measure the voltage and current output. Then calculate how many potato batteries it would take to power a laptop or various other electronics. Just make a nice table of all the devices in Excel. Maybe make a potato run a basic device like a radio or a clock for a visual display and then write up an explanation of the principle that makes the potato work as a battery in your display. And don't kill yourself with the power of the spud.
Hey, that's a cool idea! How about this wrinkle? Try different fruit/vegetables/whatever, and find out which does a better job at powering your laptop--this is good, basic science.
EDIT: I hear lemons make good batteries, BTW.