Best thing to do is buy the battery and charger from the manufacturer. Lithium batteries require less voltage to charge at typically .7-1.1 volts less than their lead acid/AGM counterparts. Most all lithium manufactures list the max charge voltage and rate for their batteries. For instance my AGM 16V charger like we use in the Dragster charges at almost 19 volts, my Lithium one maxes out at 18.2