The next administration should establish a national initiative built around ambitious goals to accelerate development and deployment of dramatically improved energy-storage technologies. Developing such technologies would help establish a strategic new domestic manufacturing sector. Deploying such technologies would expand the range of low-carbon pathways available to fight climate change—especially those relying on variable renewable energy resources, like wind and solar power. Deploying such technologies would also improve the performance of smartphones, drones, and other vital electronic tools of the 21st century.