Marine Battery vs Lithium

Marine Battery vs Lithium

Many people do not know that lithium-ion marine batteries are more efficient, and can last up to 10 times longer than lead-acid batteries.

Hence, when it comes to marine battery vs lithium ,  the latter is an excellent choice for boating applications

Marine Battery vs Lithium
Marine Battery vs Lithium

Marine Battery vs Lithium

With more boaters moving from Lead acid batteries to lithium ion batteries, there are different opinions on why this is so and the advantages of the lithium-ion battery over the lead acid battery. Below are some frequently asked questions and answers:

Are lithium batteries better than deep cycle battery?

Many boaters prefer the lithium ion battery because of the following reasons:

  • They weigh less (half the weight of their lead acid battery counterparts)
  • They are more durable lasting up to 10 times longer than the lead acid batteries
  • They are more efficient
  • Increased performance

These benefits make the lithium batteries a perfect choice for all boating applications.

Size and Weight Reduction

Generally, all boats have a weight limit. Lesser weight in your boat is more ideal for your boat.

This is one of the reasons why opting for a lithium ion battery is more beneficial. Unlike lead acid batteries, the lithium ion battery is half their weight and it has the same capacity as these lead acid batteries.

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This means that you can get less weight on your boat and still have a high-functioning battery.

So for instance, the Dragonfly 100 Ah lithium battery weighs about 31 pounds but the weight of an average 100 Ah lead-acid battery is between 60 and 80 pounds, based on the type of battery.

Increased Number of Charge-Discharge Cycles

The number of charge discharge cycles in the deep cycle lead acid marine batteries lasts between 500-1000 cycles.

In comparison, the lifecycle of the lithium marine battery is about 3000-5000 cycles.

Proper maintenance of the lead acid battery is a key factor to the durability of this battery but with lithium ion batteries, little to no maintenance is required and their durability and increased efficiency are guaranteed.

Increased Power Storage

If a lead acid battery is drained below 50%, this can affect the battery negatively by shortening the life of the battery.

For the lithium ion batteries, many manufacturers rate their batteries to allow 80% depth of discharge.

This means that lithium ion batteries can be 100% discharged without causing any damage to the batteries.

This particular feature is an amazing advantage of using lithium batteries. With the increased power storage, you can get double the capacity as you would in lead acid batteries.

Also, you will only need half the batteries and in terms of weight, you get twice as less weight as you would using the lead acid batteries.

Cheaper Long-Term

Purchasing a lithium marine battery is much higher than getting a lead acid battery. The benefit of the lithium marine battery, however, is that it offers durability and will save you unnecessary cost in the long run.

Unlike their lead acid counterparts, the durability of the lithium ion battery along with their high efficiency is definitely remarkable.

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It should also be highlighted that you will only need half as many lithium batteries compared to lead acid batteries.

Is It Easy to Make the Switch to a Lithium Marine Battery?

While lithium batteries are basically replacements, your battery bank is built to accommodate these batteries just like they can with the lead acid battery.

However, it is important to note that you cannot just make the switch from lead acid battery to lithium ion battery easily.

This switch may involve the use of some added or extra components before the installation process can be completed.

Here are some few things you may need to do:

  • The inverter and battery may need to be upgraded depending on your use and application. This upgrade is important to maximise performance of the battery
  • You may need to get a battery monitor. Since lithium batteries do not indicate when they are about to die, a battery monitor will help you watch how low your battery is and when you need to plug in your charger.

These are basic things you need to do but be informed that any slight error in the electrical system can lead to greater harm.

Get in touch with a professional or an expert if you do not know how to make the switch from lead acid battery to lithium ion battery confidently.

FAQ Section


How Long Do Lithium-Ion Marine Batteries Last?

Basically, a lithium marine battery lasts for about 3,000-5,000 charge cycles which is about ten years and even longer.

Dragonfly Energy provides a warranty of five years on their lithium batteries. This is similar to the warranty of one to five years provided by lead acid manufacturers.

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Are Lithium Batteries Safe on Boats?

The answer to this question is simply yes. Lithium batteries are very safe for use in marine and boat applications.

Basically, all lithium ion batteries are sealed which prevents them from being exposed to any kind of moisture from their surroundings.

Also, many lithium batteries have an internal battery management system which is used to identify or detect adverse and harmful conditions.

Once this happens, the system shuts down the battery in order to keep it safe and prevent damage or thermal runaway.

Do you need a special charger for lithium marine batteries?

You do not need a specific lithium battery charger.

Can I use a lithium battery to start my outboard motor?

Yes. The lithium ion boat battery can start a outboard, and even power a trolling motor.

Is there a better battery than lithium?

Yes. Fluoride batteries have the potential to last eight times longer than lithium batteries,


How Expensive Are Lithium Marine Batteries?

Undoubtedly, lithium marine batteries are quite expensive and they cost about $1,000 for a 100 Ah capacity battery.

Although the price is on the high side, this is very beneficial in the long run as it will save more cost and also last longer than the lead acid batteries.

 Is Upgrading Your Marine Battery to Lithium Worth It?

Although lithium marine batteries are far more expensive than the lead acid marine batteries, this additional cost is compensated for with more benefits and advantages such as:

  • Increased efficiency
  • More safety
  • Durability and
  • Significant reduction in weight

While thinking of whether or not the lithium batteries are too expensive, they are undoubtedly better in the long run as they will save you unnecessary expenses that may be incurred when I swing the lead acid batteries.