A research team from the University of Science and Technology of China has developed a groundbreaking lithium-hydrogen (Li-H) battery system that employs hydrogen gas as the anode, presenting superior energy density and voltage compared to traditional hydrogen-based batteries. By pairing hydrogen with lithium metal as the anode, the battery demonstrated exceptional electrochemical performance, achieving a theoretical energy density of 2825 Wh/kg and maintaining a steady voltage of about 3V. The round-trip efficiency of the Li-H battery was an impressive 99.7%, indicating minimal energy loss during charging and discharging cycles and ensuring long-term stability. To enhance cost-efficiency and safety, the team introduced an anode-free version that deposits lithium from lithium salts during charging, maintaining high efficiency and stability even at low hydrogen concentrations. This innovative battery design offers significant advancements in energy storage solutions for renewable energy grids, electric vehicles, and aerospace technology, surpassing conventional nickel-hydrogen batteries in terms of energy density and efficiency. The research holds promise for the future of hydrogen-based batteries, paving the way for scalable and cost-effective energy storage systems.