TOP PICK AMONG DEEP CYCLE MARINE BATTERIES: powerful, vibration resistant, made to work in highly demanding vehicles, quality built, and lots of satisfactory reviews. It is the most common choice for boats and trolling motors. The dual SAE & 5/16" stainless steel stud posts provide maximum connectivity for reliable starting power and deep cycling capability. It is also designed to handle repeated recharge cycles, making it an ideal choice for a variety of marine applications. It can be used as a starter or deep cycle battery and offers superior vibration resistance to ensure long life in tough conditions. The Optima BlueTop is built with the finest materials possible, and the unstoppable performance is ensured with the 155 minutes capacity and 870 CCA cold cranking amps. This marine battery is designed to fit a wide range of boat and RV applications and will keep your boat running for many years! PROS🟢 Weather and water resistance Durable and vibration resistant CONS🔴 None that we could find