Batteries stories

 
Some gadgets still require you to use AA batteries, like a Wii or Xbox 360 controller or a cheap digital camera. Wouldn't it be handy to not have to pop rechargeable batteries into a charger and wait for it to juice up? A new battery design concept would eliminate the wait time by letting you wind up the battery to recharge it.
 
What if you could use carbon fiber as a battery? That's the idea scientists at the Imperial College of London are working on, aiming to build a car out of carbon fiber material that would not only function as a battery, but will be a strong and light substitute for the sheet metal on cars today.

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