Not another spin on the old lemon battery. But I'm unfamiliar with what's actually going on here. According to the article, "the Eco-Friendly cellphone runs on an innovative battery which makes use of enzymes to generate electricity from carbohydrates."
I'm sure I should know how that works. But I don't. Or maybe I do and I just don't know that I do. Feel free to enlighten me in the comments.
It does remind me of the clever T-shirt I saw at Chicago's Shedd Aquarium recently: "Burn Carbohydrates, Not Hydrocarbons".