Marine/RV Batteries

RV Marine BatteryWorldwide Battery knows the last thing on your mind when you’re out on the water is your Marine or RV battery. Selecting a new 12-volt marine battery for your boat can be a daunting task for first-time buyers. That’s why Worldwide Battery takes all the guess work out of selecting the right type for your watercraft. Many types are available, each with a different purpose, and each with various advantages and disadvantages.

There are two basic types of 12-volt batteries: 1) deep-cycle batteries, which are used to power electrical accessories such as trolling motors, fish-finders and radios and 2) cranking, or starting, batteries, which are designed to start your main engine. Dual-purpose batteries that can perform both these functions to some extent also are available.

Deep-Cycle Batteries:

Trolling motors and other accessories sip power at a slower rate for extended periods. Batteries that power them usually aren’t recharged until the end of the day. These deep discharges are hard on battery plates, so deep-cycle batteries have fewer yet thicker lead plates than cranking batteries and are built to withstand deep cycling.

A deep-cycle battery’s reserve capacity (RC) rating indicates how long it can carry a specific load before falling into the dead zone. The higher the RC number, the longer the battery will power your accessories. Remember this when choosing a battery. Typically, a deep-cycle battery will have two or three times the RC of a cranking battery. A deep-cycle battery also can withstand several hundred discharge/recharge cycles, while a cranking battery is not designed to be totally discharged.

Cranking Batteries:

Engine cranking requires lots of power in a short burst. A battery with more surface area on the lead plates inside it delivers more fast power than one with less plate surface. For this reason, cranking batteries are made with thinner, more numerous lead plates. When the engine is running, the battery is quickly replenished by the alternator.RV Battery


The marine cranking amp (MCA), or just cranking amp (CA), rating found on a battery’s label measures a battery’s starting power. 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. 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.

Checkup and Storage:

Whether or not your boat is stored for the season in a warm garage or out in the cold, your best bet is to remove all batteries and bring them inside.  A fully charged battery with a perfect electrolyte level can probably withstand temperatures down to zero degrees without freezing.  But the colder it gets, the more easily a battery can discharge, and therefore the more easily it can freeze at higher temps.  If even one of the cells freezes, the battery is shot!  Fully charge them about once a month over the winter and they will be ready when you are in the spring.  Try to keep them off of concrete floors is possible and cover the terminals to help prevent discharge.  The last thing you want is a dead battery on the launch ramp on opening day or a dead trolling motor battery.

If you have any questions or concerns, call us at (317) 845-1330 or visit our Contact Us

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