Battery Tender  BTL24A360C Lithium Iron Phosphate Battery and Green Lithium Battery Charger 80% Lighter and 5X the life of a traditional lead acid battery only 2.61 pounds Safe, no liquid Lasts 5 times longer than lead acid batteries Foam spacers included to fit multiple size battery boxes Fully charges and maintains Lithium Iron Phosphate batteries for Powersport use 5 step charging (Qualification, Recovery, Bulk, Absorption, Float at 13.6 volts)