Charger for charging RV batteries of any type (Lithium, AGM or Flooded Lead Acid) from alternator in tow vehicle at higher charge amperages and correct voltage for RV batteries. Sterling brand, Wildside Battery to Battery Charger, 25 Amp. Perfect to charge RV batteries from tow vehicle while traveling, protecting the tow vehicle alternator while providing the correct voltage for charging any battery type from Lithium, AGM, Gel, or typical lead acid batteries.