Lithium is the substance most commonly used in batteries, particularly in rechargeable lithium-ion batteries. These batteries power a wide range of devices, including smartphones, laptops, and electric vehicles, due to their high energy density and lightweight properties. Lithium-ion technology has revolutionized portable electronics and has become essential for emerging technologies like renewable energy storage. The batteries operate by moving lithium ions between the anode and cathode during charging and discharging cycles. As demand for energy-efficient solutions has grown, the use of lithium in energy storage systems continues to rise, making it a critical component of modern technology.