Batteries

I love portable electronics, but I hate batteries with a passion. My iPhone, I end up having to charge every 3 days or so, and for the last day and a half I'm always thinking, "I don't want to use the phone because I don't want to lose my battery if I really need to call somebody". Has there really been significant progress in batteries over the last 10 years? Seems like the best people can do is be more power efficient and use larger batteries. Its 2010... I'm supposed to have jetpacks by now, but I'll settle for a battery that lasts 2 weeks. I only hope that carbon nano-tubes will save me from my battery hell.