Energy storage batteries are particularly suitable for various events that require stable power supply, efficient energy management, and resilience. Renewable energy integration, 2. Peak shaving in. Battery Energy Storage Systems (BESS) store surplus electricity and deliver it within seconds, converting variable output into dependable capacity, balancing supply and demand, cutting peak costs, and strengthening resilience during extreme weather and outages. Two forces make BESS indispensable. In the past five years, over 2 000 GWh of lithium-ion battery capacity has been added worldwide, powering 40 million electric vehicles and thousands of battery storage projects. With demand for energy storage soaring, what's next for batteries—and how can businesses, policymakers, and investors.