EarthX ETX24C Lithium battery with BMS. Replaces YTX14H-BS, YTX20CH, GYZ16H The one and only lithium battery to have a full battery management system that protects from over discharge, over charge, short circuit, cell balancing built in and excessive cranking protection Environmentally friendly. Non-toxic, Non-contminating. Lead free. No hazardous materials Fast charge when needed. Full charge in just 30 minutes. Maintenance free Extremely light weight! 80% lighter than a lead acid battery. .