No Substitutions: The key thing to remember when purchasing cranking and deep-cycle battery types is not to substitute one for the other. A deep-cycle battery also can withstand several hundred discharge/recharge cycles, while a cranking battery is not designed to be totally discharged. Typically, a deep-cycle battery will have two or three times the RC of a cranking battery. The higher the RC number, the longer the battery will power your accessories. These deep discharges are hard on battery plates, so a deep-cycle battery like the Bass Pro Shops XPS 12-Volt Deep Cycle Marine Battery have fewer yet thicker lead plates than cranking batteries and are built to withstand deep cycling.Ī deep-cycle battery's reserve capacity (RC) rating indicates how long it can carry a specific load before falling into the dead zone. Batteries that power them usually aren't recharged until the end of the day. Trolling motors and other accessories sip power at a slower rate for extended periods. Check your engine's manual for its recommended MCA/CA rating before shopping for a battery, and always choose a battery with a rating equal to or greater than the recommended value. And if you're using a newer model outboard with sophisticated computers, pumps and sensors that don't take kindly to being underpowered, you certainly don't want to scrimp on starting power. The marine cranking amp (MCA), or just cranking amp (CA), rating found on a battery's label measures a battery's starting power. When the engine is running, the battery is quickly replenished by the alternator. For this reason, cranking batteries are made with thinner, more numerous lead plates. A battery with more surface area on the lead plates inside it delivers more fast power than one with less plate surface. Cranking Boat BatteriesĮngine cranking requires lots of power in a short burst. Dual-purpose batteries that can perform both these functions to some extent also are available. There are two basic types of 12-volt batteries: 1) cranking, or starting, batteries, which are designed to start your main engine, and 2) deep-cycle batteries, which are used to power electrical accessories such as trolling motors, fish-finders and radios. Understanding the different types of marine boat batteries available and their applications will help you select the right one to power your rig. With this handy buyer's guide, however, you'll have easily understandable information at your fingertips so you can choose a battery ideal for the tasks at hand. Many types are available, each with a different purpose, and each with various advantages and disadvantages. You may be asking questions like "What type of battery is used for a trolling motor"? or, What is a deep cycle battery"?. Selecting a new 12-volt marine battery for your boat can be a daunting task for first-time buyers.
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