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Marine and Boat Battery
Buying Guide

Why Consider Lithium Over Lead Acid Batteries?

On the Water You Require Reliability, Longevity, and Efficiency

10 Year, 2000 Cycle Limited Warranty on X2Power Lithium Batteries With Bluetooth

  • Low Self-Discharge
  • Flexible Installation
  • Consistent Power
  • Lightweight
  • Maintenance Free
  • Super Safe

Shop X2Power Lithium Marine Batteries   Shop X2Power Lithium Marine Chargers  

Learn About the Different Types of Marine Batteries

2 People on a purple boat speeding through the water

Did you know...
Deep cycle batteries come in both AGM and lithium chemistries.

Deep cycle marine batteries feature a heavy charge and discharge cycle, making them perfect for long-lasting power on fishing boats, kayaks, and any other watercraft using a trolling motor or electric motor.

If you're operating a live well pump, depth finder or fish locator, a deep cycle marine battery generates the reliable, durable energy you need.

Deep cycle, or deep cell batteries are designed with fewer, but thicker plates, which means they can be discharged at a consistent rate for a longer time, at a higher depth of discharge.

It also means they can withstand high temperatures while providing high electrical currents. Deep cycle boat batteries can be drained and recharged many times; starting batteries can't. That's why they're typically used to power electric motors, and other applications, too.

Shop Deep Cycle Marine Batteries

Marine Battery Chemistry Types

At Batteries Plus you can find three different chemistries of marine batteries. The best one for you will depend on how hard you run your boat, your boat’s power demands and what accessories you have attached to it. Our suggestion? Select the battery that suits your boat’s needs.

Often called "wet cell" batteries, flooded batteries use a liquid sulfuric acid electrolyte to fill the case and cover the lead plates. This is where the term "flooded" comes from. Flooded batteries are not as rugged or vibration-resistant as other chemistries and must be mounted vertically to prevent electrolyte spillage. They self-discharge slightly more than other batteries, so you must ensure you charge them periodically in the off-season to keep them healthy.

They offer the lowest initial cost of all the batteries but require routine maintenance to ensure a long life. With proper care, flooded batteries can last several hundred charge cycles.

Compare the Top 4 Marine Batteries

At Batteries Plus you can find three different chemistries of marine batteries. The best one for you will depend on how hard you run your boat, your boat's power demands and what accessories you have attached to it. Our suggestion? Select the battery that suits your boat's needs.

Shop All Marine Batteries

Recommended Batteries for Common Applications

Application Deep Cycle or Lithium Dual Purpose Starting
Trolling Motor  Deep Cycle AGM or Lithium Recommended for Trolling Motor  Dual Purpose Recommended for Trolling Motor Starting Not Recommended for Trolling Motor
Live Well Pump  Deep Cycle AGM or Lithium Recommended for Live Well Pump  Dual Purpose Recommended for Live Well Pump Starting Not Recommended for Live Well Pump
Fish Finder  Deep Cycle AGM or Lithium Recommended for Fish Finder  Dual Purpose Recommended for Fish Finder Starting Not Recommended for Fish Finder
Outboard Motor
Deep Cycle AGM or Lithium Not Recommended for Inboard/Outboard Motor  Dual Purpose Recommended for Inboard/Outboard Motor  Starting Recommended for Inboard/Outboard Motor
Marine Lights Deep Cycle AGM or Lithium Not Recommended for Marine Lights  Dual Purpose Recommended for Marine Lights  Starting Recommended for Marine Lights
Communication Radio Deep Cycle AGM or Lithium Not Recommended for Communication Radio  Dual Purpose Recommended for Communication Radio  Starting Recommended for Communication Radio

5 Simple Steps to Prolong the Life of Your Marine Battery

Number 1

Keep track of your battery status. Monitor its state of charge/discharge and never let the charge fall below 50%. Letting batteries fall lower than a 50% charge regularly will dramatically reduce the life of your battery. If you have an X2Power Lithium Bluetooth boat battery, you can monitor it on your phone.

Number 2

Choose an adequate battery size for your needs. Using a battery that is too small will force the battery to use more power than necessary and reduce the usable life of the battery.

Number 3

Minimize your power demands. Arguably the most inexpensive way to increase life expectancy of your battery is to turn off unnecessary electronics when not in use, like fish finders, lights (when not necessary), etc.

Number 4

Add an alternative energy source like solar panels or a wind turbine to help keep the batteries charged to optimal levels.

Number 5

Equip a smart charging regulator to create the ideal charging environment to charge the battery with the boar’s alternator.

Tips for Maintaining Your Boat Battery

Get your current battery tested - Have your battery tested for free at Batteries Plus, especially if you've had your boat in storage for a season or more.

Get yourself a battery box - Use a battery box to minimize the impact of vibration and also to keep your battery secure. (Note that sometimes they're required by law.) An unsecured battery can cause damage to both the battery and your boat.

Keep connection points clean and electrolyte levels up - If you notice corrosion on your battery terminals, clean it up with a mixture of baking soda and water. If your boat carries a flooded battery, monitor the electrolyte levels before charging or operating your boat.

Waterproof chargers for the win - Waterproof chargers are perfect for your time on lakes, rivers or other waterways; you'll never find yourself on the water with a dead battery.

Note: Choose a charger with a high enough amperage for your battery.

From the Blog

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If you are concerned that your batteries aren't lasting as long as they should, your charging habits could be a large part of the problem. Read and print out our SLA charging best practices to ensure you are helping extend the life of the battery.

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How Does an SLA Battery Work?

Have you wondered how a battery works? Get the full story on SLA batteries, including how they react chemically to produce power. Learn how to recharge SLA batteries, plus get a preview of the many types of SLA batteries available at Batteries Plus.

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Batteries Plus Has the Best SLA Solutions for Your Industrial Needs

As you begin your summer maintenance, be sure to check your SLA batteries to make sure they’re ready for another year. Plus, learn how Batteries Plus can help you save money by recommending the best SLA option for each and every job.

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Modern automatic chargers ("smart") are safe to leave connected all the time. They automatically switch off & protect the battery from overcharging.

Older chargers: Must be disconnected once the battery has come to a full charge to avoid overcharge damage.

Charge marine batteries after each use and monthly for good health. Smart chargers make charging safe and easy.

Dual-purpose batteries handle both starting and deep-cycle needs, while deep-cycle batteries only handle sustained power. Choose dual-purpose if you need starting power and power to run accessories, otherwise deep-cycle for just powering equipment and accessories.

No. Deep-cycle batteries lack the burst power needed to start a boat. Using one as a starter stresses the battery and shortens its life. Stick to a dedicated starting battery for optimal performance and longevity.

The size of the battery depends on your boat's needs. Consider the type of engine, how much power you need, and whether you need one battery for both starting and deep-cycle applications or separate batteries for each.

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