The Difference Between Dual Purpose, Deep Cycle, And Starting LifePo4 Batteries for Boats

Marine batteries are available in three types which comprise deep-cycle, starter, and dual-purpose. If you’re just beginning to become a owner of a boat, fisherman or planning to upgrade your boat with lithium batteries, you might be interested in what the difference is between the three. You may also be wondering what makes lithium batteries superior to lead-acid for your boat. A few of the major benefits of lithium batteries include a longer shelf life, consistent power resistance to temperature, quicker charging, maintenance-free as well as being lightweight and safe. Let’s dive into the differentiators between the various types of marine batteries.

Dual Purpose Marine Battery

Dual Purpose Batteries

You may be asking yourself what does a dual-purpose batteries do? A dual-purpose marine battery provides enough power to begin the engine and then turn it around as well as providing the power to keep your trolling motor in good condition. Like the name suggests, dual-purpose batteries can be utilized for two reasons. The Melasta HP range comprises the MB12100 and MB12300-HP are dual-purpose batteries capable of offering the equivalent of top 20 downloaded iOS app 2021 800 amps for just two seconds to begin the motor of your boat.

Marine batteries are available in a variety of BCI sizes. The most popular marine battery sizes are those that are in Group 24, Group 27 Group 31, Group 31 and 8D. The LifePo4 Battery is a marine Group 31 battery, and the MB12300 12V 300AH battery is part of the 8D size group of batteries. The most common applications for the 100-HP are charter fishing boats and bass boats. vessels. Common applications for the MB12300 are large catamarans and sailboats.

Deep Cycle Batteries

These batteries have been created to supply stable energy and power for your trolling motor for an extended period of time. They are utilized to power heavy loads, which typically include navigation aids, fishing equipment and radios, running lights or trolling engines. It all depends on what you’re searching for You can have the most efficient of both with the dual-purpose motor. However, should you be searching for an AGM battery that can last longer on your trolling machine, ensure that you look into Deep Cycle batteries? Every single one of the Prismatic LiFePo4 Cells product lines is a deep cycle and come with both deep cycle lithium batteries as well as AGM.

Starting Lithium Batteries

The batteries for starting boats are utilized for activating the ignition. When using marine batteries it’s essential to begin the engine and then supply enough power to run the engine and other devices that are connected to the boats. Melasta has the MB12300 which is a Group 31-type battery as well as the RB300HP, which is an 8D Group battery. The High Performance series of batteries are marine-starting batteries as well as deep cycle batteries that supply power to onboard electronics. The MB12100 is a higher the peak amps of our normal batteries. The increase in peak amps is able to begin even the most demanding outboard motors. In essence, starter batteries release an enormous amount of energy for only a short amount of time, making them ideal for beginning your outboard engines.

LifePO4 Trolling Motor Battery

Trolling Motor Batteries

Trolling motor batteries specifically made batteries for the trolling motor of a boat. Their purpose is to supply electricity for longer periods of time while trolling through fishing zones. The quantity of lithium batteries you require will depend on your trolling motor’s voltage. Melasta has 24V and 12V lithium batteries. If you own a 12V trolling motor, you have the option of choosing from a variety of 12V lithium batteries. If you own a 24V trolling motor, you could make use of two 12V batteries in series , or one 24V battery. If you own an engine that runs at 36V, you could use three twelve-volt batteries together. Melasta provides a range of 12V lithium batteries that you can pick from. Similar to a gauge for fuel tanks amp hours determine the length of time the battery will last. The amp-hour is a measure of the charge inside your trolling motor’s battery. The most commonly used trolling motors that are made of lithium will be light and have enough amp-hours to maximize the time you spend fishing. Melasta has a variety of great choices for trolling motors, such as their MB1252, MB1260, MB1275, MB1280, and MB12100 that are 52AH 75Ah, 60Ah 80Ah and 100Ah deep-cycle batteries. For the same amount of run time like a wet or AGM lead-acid battery, you’ll require an lithium battery that has 60% of the capacity of the lead-acid battery. If you’d like more time on the water, you can size larger from there, or add more batteries to the battery bank of your boat.

LifePO4 Marine Battery

How To Charge Marine Batteries

If you compare lithium marine batteries with lead-acid batteries, lithium marine batteries charge at a greater capacity and also charge more effectively. This means that they are charged more quickly. Lithium batteries offer other advantages, and they do not have to be charged even if they’re discharged partially. They are not like lead-acid batteries that are left in a partial state of charge can reduce performance by sulfating, dramatically. and lifespan.


We suggest using a multi-bank charger , so the batteries is charged on its own to ensure they remain balanced and are fully charged. The ideal solution is to you should use a charger with an lithium charge profile however, the majority of AGM charge profiles perform just fine. Two of our recommended chargers are Dual Pro and NOCO chargers. NOCO or Dual Pro chargers.


LiFeP04 battery for marine use can be charged using many alternators. Based on the high-quality of an alternator it is likely to be compatible in conjunction with LiFePO4 batteries. Poor quality alternators that have inadequate voltage regulation could result in the BMS to shut off LiFePO4 batteries. If the BMS cuts off the batteries, the alternator may be damaged. To safeguard your LiFePO4 battery and alternator, ensure that you use an appropriate high-quality alternator, or install the voltage regulator. For assistance, please contact Melasta technical support should you require assistance.


If you’re planning to buy your first battery or upgrade from lead acid you should know what you’ll need, in relation to your setup and the power needs. If you’re looking to switch your boat over into lithium battery, be sure to check our range of marine lithium batteries. If you have questions you have, contact us and we’ll be happy to assist you.