Chinese battery manufacturer CATL has reportedly achieved a significant breakthrough in lithium metal battery (LMB) technology, potentially doubling the lifespan of these batteries. This advancement could lead to LMBs with energy densities exceeding 500 Wh/kg, surpassing some solid-state batteries. By identifying the continuous consumption of electrolyte salt LiFSI as the primary cause of cell failure, CATL optimized the electrolyte formulation, enhancing durability and performance. This progress marks a critical step towards commercially viable LMBs for applications like long-range electric vehicles and electric aviation, offering both high energy density and longevity. The prototype demonstrated a lifecycle of 483 cycles, showcasing substantial improvements over previous iterations.