Battery energy storage systems offer power grids key opportunities for better flexibility, renewable energy integration, and reliable power supply by storing excess renewable energy during low demand times to release during peak demand enabling higher renewable energy penetration. Battery energy storage systems offer power grids key opportunities for better flexibility, renewable energy integration, and reliable power supply by storing excess renewable energy during low demand times to release during peak demand enabling higher renewable energy penetration. Battery energy storage system (BESS) can address these supply-demand gaps by providing flexibility to balance supply and demand in real-time. When renewable power production exceeds demand, batteries store excess electricity for later use, therefore allowing power grids to accommodate higher shares. Breakthroughs in battery technology are transforming the global energy landscape, fueling the transition to clean energy and reshaping industries from transportation to utilities. With demand for energy storage soaring, what's next for batteries—and how can businesses, policymakers, and investors. 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. EVs accounted for over 90% of battery use in the energy sector, with annual volumes hitting a record of more than 750 GWh. Battery storage provides crucial grid-balancing capabilities, mitigating fluctuations and ensuring a reliable power supply. Furthermore, the rising demand for backup power in critical infrastructure sectors such as utilities and communications is bolstering market growth. A battery energy storage system (BESS) is.