Researchers from institutions including the City University of Hong Kong have developed a novel water-based battery in China that utilizes a neutral electrolyte solution, making it non-flammable and capable of enduring over 120,000 charge cycles. This significant lifespan far surpasses that of conventional batteries, such as smartphone batteries (around 800 cycles) and electric vehicle batteries (1,500-3,000 cycles), and even large-scale grid storage systems (6,000-10,000 cycles). The battery employs covalent organic polymers for its negative electrode and stores divalent ions like magnesium and calcium, offering enhanced safety and environmental friendliness, with the potential for direct disposal without special treatment. While its energy density is lower than lithium-ion batteries, making it unsuitable for mobile devices, it holds promise for stationary applications like grid storage and emergency power systems due to its durability and safety features.