and actually there is a way in the near future for a battery to charge itself without a power source. its called nuclear fussion. not fission, fussion. this nuclear fission is being developed as we speak. not many details are being relesed on this product but id say at this rate this self-recharging battery will be developed in the next 10-15 years. it is said to run on a single water molecuel. the only thing that is keeping this project from being created is the enviormentalist that are affraid that these testing plants might have a *meltdown*. which will destroy the areas soil and make it an unlivable place. which i beleive is a load of crap, but anyways, there will be a self rechargable battery in the near future.