Nanogenerators

I was perusing through engadget as usual and there is a recently posted article about nanogenerators. Nanogenerators are extremely small fibers that when flexed or strained will emit an electrical charge. If these fibers are woven into your clothing, you could charge your phone in your pocket! How convenient would that be? They took a bunch of the fibers and placed them into a stamp size chip and found that flexing and straining the fibers within this small chip emitted the power of two AA batteries. I think nanogenerators will lead to some definite good in the future... until we find out they cause cancer or some sort of bodily damage.
Info here: Nanogenerators