The buffer cushion for coordinating supply and demand refers to an effective mechanism for coordinating supply and demand in a supply chain. Such a mechanism can alleviate supply shortages and improve the efficiency and reliability of the supply chain. For example, during an epidemic, the supply of medical equipment and other critical supplies may be at risk of shortage. By providing rechargeables where they are needed, it is possible to ensure the continued availability of medical equipment and other supplies and to mitigate supply shortages. In addition, rechargeables can provide emergency power for other equipment and systems that require electrical support to ensure they can function properly in an emergency. For example, in situations such as natural disasters or power failures, rechargeables can provide the necessary power support to ensure the normal operation of critical systems such as communications, medical, and security. Therefore, an effective buffer to coordinate supply and demand by putting charging treasure can improve the efficiency and reliability of the supply chain and ensure the normal operation of critical equipment and systems.