the name your price tool isn't witchcraft! and i didn't turn your daughter into a rooster. she just looks like that. burn the witch! the name your price tool a dangerously progressive idea. despite all of our hi-tech gadgets, battery life remains a big issue for consumers. for soldiers it's a more serious issue. >> researchers are working on a charger that can help us all stay powered up just by putting one foot in front of the other. tech contributor tina trinh has the details. >> there are million people in new york city. that's 16 million feet pounding the pavement every day. what if all those feet could do more than get from point a to point b? what if they could generate