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Best Place To Buy Deep Cycle Marine Batteries VERIFIED

Boat batteries often have different demands on them. Your boat motor still needs a battery to start it, but there may be many other power needs that the battery will supply. In smaller, day-use boats, your marine battery must also power the lights, gauges, pumps, and other electronics. On the other hand, fishing boats and live-aboard vessels may require multiple battery types to run household systems or electric motors.

best place to buy deep cycle marine batteries

Dedicated fishing boats with a trolling motor require a starting battery and a deep-cycle trolling marine battery bank. Trying to power a trolling motor all day on a starting or multi-purpose battery would not work. Not only would the battery drain quickly, deep cycling a starting or multi-purpose battery damages the battery. This could also leave you stranded because your trolling motor could kill the starting battery.

Deep-cycle lead-acid batteries should not be discharged below 50% of their capacity. Doing so will damage them. Additionally, as lead-acid batteries discharge, their voltage also drops. Combining these two factors means that you typically only get about half of the rated capacity out of a lead-acid battery.

While deep-cycle lead-acid batteries have the lowest initial cost, they also have the shortest lifespan, lasting only 2-5 years. Because of the lead plates, lead-acid batteries are very heavy, which is not ideal for boating applications where weight is a vital concern. Lastly, FLA batteries are not sealed, so you must install them upright to prevent the acid solution from leaking.

Lithium-ion deep-cycle batteries use lithium salt to store energy instead of sulfuric acid and lead plates. They are relatively new and are still the most expensive type of deep-cycle battery. However, their high upfront cost is often justified by their many advantages, especially in boating applications.

You can drain lithium-ion deep-cycle marine batteries to 80% or more of their capacity without damaging them. Additionally, with the proper charge controller, they charge much faster than lead-acid batteries. This combination makes lithium marine batteries much more efficient than their lead-acid counterparts.

The biggest disadvantage of lithium-ion marine batteries is their initial upfront cost. However, you often end up saving money in the long run since they usually last at least five times longer than traditional lead-acid batteries.

The cranking battery has more yet thinner plates to give a fast voltage spike to crank an engine, but is not intended to maintain high power output for long periods. Yes, a deep cycle battery can be used to start your motor in a pinch, but a two- or three-battery system is highly recommended to separate the engine battery from the accessory (house) batteries.

Lifeline deep-cycle RV and marine batteries come in twelve, six and two volt forms and can be linked together in a combination of series and parallel connections to achieve the desired system voltage. The costs of batteries regardless of their size and voltage is driven mainly by the energy they can store and deliver, as well as their life expectancy. There are also several battery case sizes that makes it easy to accommodate different sized battery boxes. Battery Counsel International has a list of conforming battery group sizes to help in making accurate comparisons. Lifeline batteries come in a full array of these industry standard case sizes and additional industry specific custom sizes.

The goal of these RV battery papers is to provide insight into RV AGM batteries. Topics will include a detailed definition of the characteristics of deep-cycle RV batteries, proper charging practices and RV battery storage procedures. The last portion of these RV battery papers will cover battery testing procedures designed to assist in the diagnosis of damaged batteries.

Although proper AGM battery charging techniques may seem like a bit of a mystery as a result of greatly differing industry information, it is really quite simple. What you take out of your RV battery bank you will need to replace fully or suffer the consequences of shortened battery life. All RV battery manufacturers have their own recommended charging perimeters and that is why it is best to go straight to the source. When you contact us at Lifeline for assistance you will be talking directly with the family and will get quick and accurate answers on all technical inquiries.

One of the hottest topics surrounding deep-cycle RV batteries is what to do to properly store them when not in use. Storing batteries properly can certainly be the difference between enjoying a long useful battery life or having them fail prematurely. The first thing to make sure happens prior to storing your batteries is confirming that they are fully charged. Storing your RV batteries in any state less than 100% state of charge will damage them. Once you have determined that your RV batteries are fully charged and that you will not need them to perform any tasks, it is best to fully disconnect them from your RV. If you have access to a power source you could also leave the batteries connected and on a float charge through the storage period. If you do not have access to a power source, but would prefer not to disconnect your RV batteries, you will need to boost charge your batteries with some regularity based on the size of DC phantom draws that exist on your particular RV. Keep in mind that your master battery switch will typically kill all significant DC draws, but additional phantom draws will continue to discharge your batteries. For fully charged batteries that are disconnected from any DC draws, we recommend that you put a maintenance charge on your batteries every 6 to 8 weeks. This period can be extended as the temperatures where the RV is being stored drop.

Hopefully this information has helped shed light on several facets of RV deep-cycle batteries. The durability and industry leading performance of Lifeline RV and Marine batteries, both deep-cycle and engine cranking, comes from more than 40 years of battery industry experience. We encourage everyone to reach out to us directly so we can help you avoid the perils of deep-cycle AGM battery misinformation and ultimately get you pointed in the right direction.

RVs use deep cycle batteries. They may look like a standard car battery, but how they deliver their power is very different. A deep cycle battery provides a consistent amount of steady power when discharging. RV batteries are typically 12V batteries that use six 2.1V cells to create 12.6V of output.

Generally speaking, marine batteries will last anywhere between two to five years. However, that's entirely dependent on how well the battery is maintained. You can extend the life of your boat's battery by connecting it to a charger when not in use.

5. Smaller Footprint: Not only are lithium batteries lighter, they also take up less space. For instance, you can buy a 24v lithium battery that is the same size as a 12v, group 27 deep cycle battery.

For trolling motors use, we recommend a battery with AT LEAST a 100 amperage hour rating, a Group 27 rating and 175 minutes of Reserve Capacity (RC). Due to shipping restrictions, we do not sell marine batteries at However, both types listed above should be widely available in most areas. Lithium batteries are more difficult to find but we recommend Lithium Battery Power LLC if you decide to go that route.

Before we dive into what is a deep cycle battery, it is first important to understand a few battery basics of what a cycle is, what depth of discharge means, and what it really means to deep discharge a battery.

In SLA (sealed lead acid) batteries, the electricity is generated in the plates. In high-rate batteries, there are many thin plates to allow for more surface area for quick generation of energy. In deep cycle batteries, the plates are thicker than those inside a high-rate battery because the energy-inducing chemical reaction goes into the plate and therefore needs to be thick to be able to handle the reaction. If the plates were thin, like they are in high-rate and starter batteries, the lead plates would degrade very quickly and would not hold up to multiple deep discharges over time.

Two subcategories of deep cycle SLA batteries would be deep cycle gel and AGM (absorbent glass mat) deep cycle. Gel batteries use a substance that turns the electrolyte acid inside the battery into a thick gel, therefore making it non-spillable. The gel is better at heat distribution and off-gassing than the AGM, and therefore has better performance throughout its life. In AGM batteries, a glass mat is placed between the negative and positive plates to keep the electrolyte in place. The mat is what makes the battery non-spillable and optimizes the surface area of the plates for better electrolyte distribution over conventional batteries.

In a lithium deep cycle battery, energy cells are used. Energy cells are designed to deliver sustained current over a long period of time, making them ideal for use in cyclic and deep cycle applications. In addition to the cell makeup inside a lithium battery, the circuitry also matters as the protections may set limits to how much current can be drawn from the battery. Different lithium batteries will have different levels of protection, so make sure to check the technical documentation and specifications for further information.

Before selecting a battery, you will need to have a clear idea of what needs to be powered, for how long, how often, and how much power it needs. In general, deep cycle batteries are cyclic applications where the user tells the battery when it needs to be used.

For example, a medical cart used in a hospital will be away from an electrical outlet and need battery power for the entire time it is unplugged. In this instance, the nurse or doctor tells the battery when it will be used by turning on the medical cart. It will be used every single day for many hours each day. The battery needs to provide consistent power for a long amount of time, meaning this is a deep discharge use and therefore needs a deep cycle battery. 041b061a72


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