The revolution of smartphones have changed the dynamics of every part of life. With the continuous development in the smartphone’s technology, they have become the integral part of human life. A phone can be used for playing games, watching movies, performing office work etc. But the smartphone needs a stable power to perform these tasks. The job of keeping mobile phones active has been done considerably well by the phones batteries over the years. In this article, we will try to figure out the battery types of smartphones, their benefits and de-merits, the future of batteries.