Replaces: YTX20L-BS, CBTX20L-BS. Advanced AGM technology and maintenance free batteries: 100% hermetic and totally leak proof. With respect to normal AGM batteries, they guarantee a superior starting power, a greater capacity and better life cycles for a longer duration of the battery. Specific calcium reinforced grids and special terminals welding assure the best resistance even on vehicles with high vibrations; they are unbreakable. They do not need electrolyte liquid since they are already charged and ready to use