Sodium batteries will become ridiculously cheap. That in turn will revamp our electricity grid: local demand response will be key, resilience and grid stability will improve, grid reinforcements will become less of a costly bottleneck, and solar and wind will thrive. In terms of our energy system, batteries will change everything.Batteries have been central to my research for over fifteen years, but their impact continues to surprise me. For me this journey started in 2007 when I concluded that ...