Description The SHARK® Bi-Directional DC-DC Charger from Abyss Battery® is a high-performance power solution designed to maximize efficiency on the water. This intelligent booster charger seamlessly converts 12V power from your outboard engine to charge 24V or 36V lithium trolling motor batteries—and it works in reverse too, sending 36V back to maintain your 12V starter battery. With a 720W max output (12V 60A), SHARK® can fully recharge a 36V 60Ah lithium battery in just three hours, drastically reducing downtime. Its dual-function design allows you to eliminate your house battery or downsize its capacity, saving weight, cost, and installation space without compromising performance.