YTX20HL-BS AGM Xtreme Volts Battery Maintenance Free, Absorbed glass mat (AGM) technology - No free floating acid to leak, and no venting of dangerous, corrosive hydrogen gas Factory sealed - No acid to handle. Factory activated - Comes to you ready to use. One year warranty against manufacturer defects. Ideal for on and off road powersport applications. Premium quality sealed battery produced by ISO 9001 certified manufacturer.