Physicist Hans Coster on using Nickel-iron batteries 

We interviewed Physicist, Emeritus Professor Hans Coster, at Middle Earth in the Kanimbla Valley at Lithgow. He was in charge of the Sydney Chapter of the Club of Rome and has built Hobbit Hall, an underground off-grid home powered by solar energy which is stored in Nickel-iron batteries.
Read more in Lithgow Area Local News: lithgowlocalne...