RENOGY 40A 12VDC TO DC BATTERY CHARGERThe DCC12 Series battery chargers are the most effective way to charge your auxiliary or house batteries from the alternator starter battery. Compatible with a multitude of alternator types, the DCC12 offers correct charging for AGM, Flooded, Gel, and even Lithium deep cycle batteries! Featuring a 3 stage battery charger and multiple electronic protections, owners can feel confident that their batteries are being charged optimally and automatically.