Features: The Antigravity Restart lithium battery is the first battery manufactured with built-in jump-starting technology, so you won&';t ever get stranded with a dead battery again! Compact, lightweight lithium-ion battery directly replaces many OEM powersport batteries and can also be used in custom applications The Restart batteries features include a BMS (battery management system) with over and under voltage and thermal protection along with real time lithium ion cell balancing For custom/high performance applications, make sure to match the cranking amps needed for the application to the appropriate battery Antigravity only recommends the use of a powersports specific lithium battery charger Restart batteries include a 3 year pro-rated, nontransferable warranty (registration of the battery with the manufacturer is required within 30 days of purchase by the retail customer). All warranties are to go back through Antigravity Not for use with internally modified V-Twin engines, warranty will be void if used in these applications