A "Charge Cycle" refers to the process of charging a battery from a low state of charge to its full capacity and then discharging it back to a low state. This cycle is crucial for maintaining the health and longevity of rechargeable batteries, such as those found in smartphones, laptops, and electric vehicles. During a charge cycle, the battery undergoes chemical reactions that store energy when charging and release it when discharging. Understanding charge cycles helps users manage battery life effectively, ensuring optimal performance and reducing the risk of damage from overcharging or deep discharging.