Advanced energy storage technologies are transforming the U.S. electric power market to one that is more resilient, cleaner and more diverse. As the costs of advanced energy storage technologies such as lithium ion batteries drop and market demand increases, the potential benefits are motivating states to act. Powering Up: State Trends for Advancing the Use of Energy Storage outlines how state policymakers can advance the deployment of energy storage and concentrates on three areas of recent state activity: setting statewide energy storage procurement targets; establishing financial incentives programs for storage applications; and promoting research and development efforts. The issue brief is an update to an October 2016 report, State Strategies for Advancing the Use of Energy Storage.