If you were asked how valuable electricity is in your life, what would your answer be? The common answer is yes, it’s really valuable because we are very used to it. This will be the answer of a person living in 2019. But, in 1850, William Gladstone had asked the same question to the scientist Michael Faraday and he answered “One day sir, you may tax it”. This was the vision associated with electricity that in the coming future it will be a very essential commodity for everyone.