The US Air Force Research Laboratory has invented an environmentally sound battery that can last 30 years and it could be available in the next 2-3 years.
The breakthrough betavoltaic power cells are constructed from semiconductors and use radioisotopes as the energy source. … Although betavoltaic batteries sound Nuclear theyâ€™re not, theyâ€™re neither use fission/fusion or chemical processes to produce energy and so (do not produce any radioactive or hazardous waste). … The best part about these cells are when they eventually run out of power they are totally inert and non-toxic, so environmentalists need not fear these high tech scientific wonder batteries. If all goes well plans are for these cells to reach store shelves in about 2 to 3 years. [Source]