There are several ways to approach this question: How to choose a battery for electric boats? It’s crucial to take into system the capacity, weight, and technologies used to manufacture the battery. For example, lithium-ion batteries are desirable because they are more compact with high energy concentration which is favorable for long voyages at sea. On the other hand, AGM batteries are stronger, tougher and can withstand difficult environments thus appropriate for a variety of marine engineering applications. It is always a good idea to know your boating requirements and find the correct battery for them in order to enjoy the maximum amount of boating comfort.