Getting the right tool for the job is important, and battery selection is no different. If you select a traditional starting battery to power a boat or UTV, know that it is meant to just do that alone. When used together, items such as light bars, GPS units, and countless other accessories can pull too much power for the alternator or stator to keep up with. If you're going to use accessories, use a dual-purpose battery. These are designed for cold cranking starts but also have enough reserve power to run accessories. In today’s boating world, with all of the regularly used accessories, it is not uncommon to have two starting batteries to run boats as small as 20’.