哪类充电宝最危险？

Core Viewpoint - The safety of power banks has become a significant public concern due to recent recalls of several brands caused by safety risks associated with battery cells, leading to a ban on carrying non-compliant power banks on domestic flights in China [1][2]. Group 1: Industry Regulations and Safety Concerns - The State Administration for Market Regulation has revoked or suspended 3C certifications for multiple power bank and battery manufacturers [1]. - The Civil Aviation Administration of China issued an emergency notice prohibiting passengers from carrying power banks without clear 3C markings or those that have been recalled, effective June 28 [1]. - The public is urged to check whether their power banks have 3C certification, as the potential risks associated with non-compliant devices are significant [2]. Group 2: Technical Insights on Power Banks - Power banks are essentially chemical reactors that convert chemical energy into electrical energy through lithium-ion batteries, which are the most common type used commercially [5][6]. - The energy capacity of power banks is often misunderstood; for instance, a 10,000 mAh power bank can only store approximately 0.038 kWh of energy, which is relatively low compared to its weight [10][11]. - The energy density of lithium-ion batteries is significantly lower than that of explosives like TNT and gasoline, raising concerns about the potential for catastrophic failures if safety measures are not adhered to [11][14]. Group 3: Safety Mechanisms and Recommendations - The risk of power bank explosions is heightened when they are left fully charged and unused for extended periods, as this can lead to internal chemical reactions that compromise safety [20][21]. - Manufacturers are encouraged to implement robust safety measures, including circuit control and flame-retardant materials, to prevent overcharging and ensure the stability of electrode materials [23]. - Consumers are advised to store power banks at a charge level between 30% and 60% to minimize risks and prolong battery life, as well as to avoid long-term storage in a fully charged state [28][29].