What is the best metal for a lemon energy project?

I am doing a science project on lemons and producing energy but i need a new metal to use that will give off more energy. Or like a specific lemon or anything else you can help us with.

thx!

here's a link to the website where im getting the experiment from:

http://www.energyquest.ca.gov/projects/lemon.html

You need two metals with different electrochemical potentials. Lead and copper, or aluminum and copper.

You're not going to get much energy from a lemon battery no matter what. If you need more power, use several lemons and hook them up in series and in parallel until you get the voltage and current you need.

copper for sure.. i think the other is nickel

LiAH

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