 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 Siraj Sabihaven, Aristides Ekiprakis and Marcus Mueller.