 More effective energy production requires a greater penetration of storage technologies. This paper takes a look at and compares the landscape of energy storage devices. Solutions across four categories of storage, namely, mechanical, chemical, electromagnetic and thermal storage are compared on the basis of energy slash power density, specific energy slash power, efficiency, lifespan, cycle life, self discharge rates, capital energy slash power costs, scale, application, technical maturity, as well as environmental impact. It's noted that virtually every storage technology is seeing improvements. This paper provides an overview of some of the problems with existing storage systems and identifies some key technologies that hold promise. This article was authored by Suraj Sabihuddin, Aristides Ekaprakis and Marcus Mueller.