Lithium-ion (Li-ion) batteries are an advanced energy storage solution for modern UPS systems. Compared to traditional lead-acid batteries, Li-ion batteries offer a longer lifespan, faster charging, higher energy density, and a much smaller footprint. They are lighter in weight, require minimal maintenance, and provide consistent performance even under frequent charge-discharge cycles. These advantages make Li-ion batteries ideal for data centers, industrial facilities, and critical power applications where reliability, efficiency, and space savings are essential.