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Trolling Motor Batteries

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Types of trolling motor batteries

There are usually three types of batteries available on the market. Lead-acid, AGM battery and lithium batteries.

Ordinary lead acid battery

Lead-acid batteries are one of the most common types of batteries used with trolling motors. They are an affordable option with a lower initial cost and can also handle the everyday use of a trolling motor. They usually last about 2-3 years and usually require checking your battery to make sure there is enough water in the battery. If you are running low on water, add distilled water to prevent damage to the battery.

AGM battery

AGM battery stands for Absorbent Glass Mat. Unlike lead-acid wet batteries, these types of batteries are completely sealed. AGM batteries are more expensive than regular lead-acid batteries, but do not require any maintenance. AGM batteries usually last 3-4 years, which is a little longer than normal lead-acid batteries.

Lithium battery

Compared with lead-acid batteries, lithium batteries can last 10 times longer while being smaller and lighter. As well as supporting 1-2 hours of fast charging time to ensure you get the most out of your adventure.

Some other notable advantages of lithium trolling motor batteries include:

  • Longer Lifespan
  • Light weight
  • temperature resistance
  • 1-2 hours fast charging
  • Maintenance free
  • Lower cost per cycle
  • Safe and & Non-hazardous

For more detail info, please read our article《The reason why we need upgrade the lead acid to lithium?

Trolling motor battery structure
Trolling motor battery structure

What is the best battery type for a trolling motor?

Typically a trolling motor requires a 12 volt deep cycle marine trolling motor batteries  that can deliver the required discharge power and discharge time. Lead acid batteries are less expensive, but they can spill acid. AGM batteries are sealed to prevent leaks and provide more power for longer periods of time. The price of lithium iron batteries is twice that of lead-acid batteries, but the weight is only half that of lead-acid batteries, and the service life is as long as 2000 to 4000 times. So if in terms of performance, Lithium batteries are clearly the best.

How long does trolling motor batteries last?

Lithium trolling motor batteries usually last for 4,000 times cycles, while lead acid batteries for 1,000 to 1,500 times cycles.

Also the lithium batteries are lower maintenance than lead acid batteries. Lead acid batteries need to be kept topped up with water to protect the lead plates inside them. And they will become damaged if they are allowed to get too hot or too cold. However, the lithium battery are sealed and maintenance free.

How to prolong the lifespan of the trolling motor batteries?

As we all know, Proper maintenance of the trolling motor battery, and compliance with the principles of battery use, which can greatly extend the life of the trolling motor battery.

Improper use of the battery will also shorten the life of the battery.

Anyway, here are a few tips to keep in mind to enable your trolling motor battery last longer.

Charging Tips

  • Regularly Charging. Under normal circumstances, when the battery is too low, there will be a reminder when the trolling motor battery has no electricity. At this time, you need to replenish the battery in time. Although the battery is too low, it will not lead to a direct safety accident, but excessive use will lead to over time. Damage to the battery structure.

(For more details about the lithium battery charging, please check our artricle 《Lithium Battery Charging: The Definitive Guide》)

  • Do not overcharge. The inside of the lithium battery cell is also composed of many components. The new battery is fine. If it is used for a long time, the function of which component may decline, so there will be an overcharge safety risk. Generally, Overcharging your trolling motor battery cause damage to it in the long run.
  • Use a suitable charger. Do not charge batteries with inappropriate chargers.

Using Tips

Avoid Completely Draining the trolling motor Battery

Once the battery indicator on your trolling motor shows that the battery is getting low, proceed straightaway to charge it.

Allowing the battery to completely drain out has an adverse effect on the lifespan of the battery. It could hamper performance.

When the trolling motor battery is used up, please recharge the battery in time.

Maintenance Tips

The purpose of daily maintenance is to place the lithium battery in a suitable environment, thereby delaying the aging of the battery.

Here is two maintenance tips that we need comply with.

1. Protect against moisture.

2. And avoid direct sunlight.

How long does it take to charge your trolling motor battery?

One of our most frequently asked questions is “how long does it take to charge your trolling motor batteries?”

Our experts note charging time depends on the specific charger in your system. Lithium-ion batteries have low internal resistance, so they will take all the current delivered from the current charge cycle. For example, if you have a 50-amp charger and a single 100-amp hour battery, divide the 100 amps by 50 amps to come up with a 2-hour charging time.

Another example is if you had five 100Ah (amp-hour) batteries for a total of 500Ah and a 100-amp charger. It would take about 5 hours of charging from empty to 100 percent while factoring in enough time to balance the charging cycle.

We don’t recommend you exceed this charge rate as it can lead to a shortened battery cycle life. In an emergency, the battery can be charged at a quicker rate if needed. But we don’t recommend you make a habit of emergency charging your battery.

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ELB offer an extensive range of battery sizes and configurations that support various applications. For those applications that require unique power requirements our expert engineers can help design, develop, test and manufacture custom battery solutions for the specific needs of almost any application. Contact us today for more information on our custom battery solutions.

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