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Sun 22 Aug, 2010 06:59 pm
Context:
The electric potato: How
zapping a spud 'could make it a healthy food' The electricity tricked potatoes into producing a rush of antioxidants credited with keeping the body and brain healthy. ...read
http://www.dailymail.co.uk/health/article-1305323/The-electric-potato-How-zapping-spud-make-healthy-food.html
I don't believe "energic" is a word in English. By zapping, they simply mean exposing potatoes to electricity.
Zapping is also a colloquial term for putting something in a microwave.