Li-ion bataryalar (lithium-ion batteries) are rechargeable energy storage devices commonly used in portable electronics, electric vehicles, and renewable energy systems. They work by moving lithium ions between the positive and negative electrodes during charging and discharging, allowing for efficient energy transfer. These batteries are favored for their high energy density, lightweight design, and low self-discharge rates. However, they require careful management to prevent overheating and degradation over time. Overall, Li-ion bataryalar play a crucial role in modern technology and sustainable energy solutions.