Paper Batteries

Okay, wait a second, paper Batteries? It sounds like something from the TV show Eureka, but no turns out batteries that has the properties of paper is real. Using Carbon Nano tubes embedded into cellulose material (aka paper) you end up with a paper like substance that stores power like a battery, discharges like a capacitor, and can activate with sweat or blood from a human body. Last part sounds kinda gross, but think about it, the chemicals in the human body can be used to activate these batteries so that means, no more harmful chemical batteries in pacemakers, or possible bionic body parts. Kinda cool huh? Thankfully this tech is already patented and they are working on better ways to mass produce the batteries. Oh, and in case I forget to mention it, these things are made of cheap and easy to get a hold of materials. Isn't science cool?