Lead acid batteries need to be regularly charged with a lead acid charger.Nickel-cadmium batteries are more efficient than lead acid batteries but require regular recharging. They last longer than lead acid batteries but may not be as durable in cold weather. Nickel-cadmium batteries can also be discharged more quickly than other types, so it's important to make sure your boat has enough room for them.Lithium ion batteries are the latest type of battery and are considered the best option for boats that use electric motors. They're lighter than other types of battery and can hold a charge longer, so they're...