When replacing a new boat battery, you have many options to consider. This is just as important for the “do it yourselfer” as it is for the professional boat shop. For example, if the boat uses number 4 AWG marine battery cable, it may not be best to upgrade to cable as large as 00 or 2/0, when replacing the battery. However, this is just the tip of the iceberg when it comes to selecting the right battery. Here are some useful tips to help make the selection process a little easier.
Don’t Use the Old Battery as a Guide
You might think it’s as easy as simply buying a new battery just like the old one. However, it’s possible the current battery was undersized or not properly chosen, and this could be the reason for its failure. Make sure to check with your engine manual (or contact the manufacturer) for the recommended battery size and type.
Starting or Deep Cycle Batteries?
One of the most important considerations is the use for the battery, and there are three types from which to choose:
-
Engine starting batteries
-
Deep cycle batteries
-
Combination marine batteries
An engine starting battery is designed to crank over the motor and start it. If you must crank the engine over a great deal, it will rapidly deplete the charge. However, once the motor starts, the alternator will quickly recharge it. These batteries are not designed to be completely discharged, and in fact, it can damage them and shorten their lives considerably.
Deep cycle marine batteries are not made for turning over your engine. They are designed for running electrical accessories you have on board, including a trolling motor.
Combination batteries utilize both the functions of starting and deep cycle.
Choose the Right Marine Battery for the Job
It’s not a good idea to use a deep cycle battery for starting the engine. Even if you upgrade from number 4 AWG marine battery cable to something much larger, you still run the risk of overheating the battery.
Gel, AGM, or Wet Cell Batteries?
You can select from three constructions for your battery. Here are three options.
-
Wet cell – commonly known as typical lead acid batteries. They are very popular because they are cost effective. Water must be added routinely.
-
AGM – stands for “absorbed glass mat”. No need to refill with water, and they are safer because there are no spill hazards.
-
Gel – no water needs to be added. Plus gel batteries can be stored for long periods without discharging and they are resistant to over discharging.
Cables
It’s usually best to replace your cables when replacing the battery. It’s OK to use a slightly larger size if you think there is a chance of overheating. For example, you may want to replace number 4 AWG marine battery cable with number 2. However, if you use quality cables this is not usually necessary.
Electric Wire & Cable Specialists provides high quality size double ought to number 4 AWG marine battery cable. We also sell welding cable, and security cable for all kinds of uses. To find out more about our products, visit us online now at www.ewcswire.com/.
