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6 Best Battery For Trolling Motor 2021


The best battery for trolling motor. You can maximize the use of your boat every time you go into the water by selecting the right battery upfront. You can save money and get a more extended life battery if you choose the right one.

It would be best if you searched for the best battery for trolling motor to get out fishing. Trolling motors require batteries that can deliver a continuous discharge of energy over one whole day outside in the water.

Most of the batteries are made with deep cycles, and AGM delivers the longest-running time per charge. If you are searching for a battery, you may find all the latest information confusing. Read on, and you will find the best battery for trolling motor.


Factors to consider when purchasing battery for trolling motor

1. The battery type

There are available two types of deep-cycle 12-volt batteries that are recommended for trolling motors. The first one is Lead Acid Wet-Cell, and the second one is AGM Batteries.

The deep-cycle batteries are designed for discharging smaller amounts of current. They are not for an extended period and not for more frequent recharging.


a. Lead Acid

The lead-acid batteries are maintenance-free, which first emerged in the mid-1970s. Valves have been increased to control venting during the charge and fast discharge, which let go of gases if pressure builds up.

It does not submerge the plates in a liquid form, and the electrolyte is impregnated into a moistened separator. The separator is designed like nickel-based and lithium-based battery systems.

This separator enables the battery without leakage while in operation. The lead-acid battery consists of a lower electrolyte than the flooded type battery.

Probably the most vital advantage of a lead-acid battery is combining hydrogen and oxygen to make water and prevent dry out during the operation of cycling. The recombination happens at a pressure of 0.14 bar or two psi.

The valve

The valve of the battery serves as a safety vent to prevent gas buildup rising. Venting should not be operated repeatedly, because this will lead to an eventual dry-out.

Smaller packs with capacities of up to 30Ah are called sealed lead-acid or SLA. These batteries are used for wheelchairs, emergency lighting, and small UPS.

Many lead-acid types have emerged, and the most popular and typical example is a gel or usually called valve-regulated lead-acid (VRLA), and absorbent glass mat (AGM). The gel cell consists of a silica gel which suspends the electrolyte in a paste.

SLA is the most preferred choice because it is an affordable, low maintenance, and dependable service for healthcare in hospitals and retirement homes. The VRLA is used as a power backup for cellular repeater towers, hospitals, airports, Internet hubs, and banks.

Low voltage

Unlike the flooded battery, the SLA battery is designed with a low over-voltage potential to prevent the battery from generating gas during charge. Excess charging causes dry-out, water depletion, venting, and gassing.

The maximum temperature while running for a VRLA battery is 25°C (77°F). If the temperature rises 8°C (15°F) above this temperature threshold, it will cut the battery life in half.

Lead-acid batteries are rated at a five-hour (0.2C) and twenty-hour (0.05C) discharge rate. The battery performs at the optimum level when discharged slowly.

Its capacity readings are higher at a slower discharge than at the 1C-rate. A lead-acid battery can provide high pulse currents of several C if done for a hardly any seconds.

The lead-acid battery is suitable as a starter battery or SLI (starter-light-ignition). Unfortunately, the sulfuric acid content makes lead-acid battery environmentally unfriendly.

Lead-acid batteries are classified into three usages: Automotive (SLI), motive power (deep cycle or traction), and stationary (UPS).


b. AGM or Absorbent Glass Mat

AGM or Absorbent Glass Mat battery technology became popular in the early 1980s for UPS, vehicles, and military aircraft. The battery is spill-proof because a fiberglass mat absorbs the sulfuric acid.

The shipment of this AGM battery can be without hazardous material restrictions. The plates can be designed flat similar to a flooded lead-acid pack in a rectangular case.

The AGM battery has internal resistance and can offer high currents on-demand, and delivers a long service life, including deep cycled. AGM battery is maintenance-free, offers excellent electrical reliability, and is lighter compared to the lead-acid type.

AGM batteries are less prone to sulfation, and they can sit in storage for a more extended period. The battery has a low self-discharge and can withstand low temperatures.

A charge of AGM battery is up to five times faster than the flooded version. AGM battery delivers a depth-of-discharge of 80 percent.


2. Amperage Hour Rating

You can compare a battery’s amperage hour rating to a car’s gas tank. A battery with a 115 amp hour rating will beat a 100 amp-hour rated battery in terms of endurance.

A 100 amp hour rated battery can provide 100 amp hours of current. If a trolling motor runs at low speed and pulls only four amps, the battery will last up to 25 hours. (100 amp hour rating / 4 amps = 25 hours).

If the trolling motor is pulling 40 amps, the battery will last for 2.5 hours (100 amp hour rating / 40 amps = 2.5 hours). It is recommended to use a 100 amperage hour rating for trolling motors, a Group 27 rating, and 175 minutes of Reserve Capacity (RC).


3. Warranty

Not every manufacturer has the same kind of warranty. Some manufacturers offer three months warranty, ten-year warranties, and some provide lifetime warranties.

If you want to protect yourself using a battery, go for a decent warranty. Look at the reviews, and you should go for a battery with a good warranty.


6 Top best battery for trolling motor

Model  Cold Cranking Price Rating Link
NorthStar NSB-AGM31M AGM Group 31 Marine Battery 1370MCA/1150CCA Cycles over 900 times $$$ 4.9 Buy From Amazon
Odyssey 34M-PC1500ST TROLLING Thunder Marine Dual Purpose Battery 880 amp $$$ 4.7 Buy From Amazon
Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V 3,300 Amp AGM High Output Battery $$$ 4.5 Buy From Amazon
VMAX MR137-120 AGM Sealed Marine AGM Battery 12V 120AH for 50lb -110lb thrust Minn Kota 120AH for 50lb $$$ 4.5 Buy From Amazon
Optima Batteries 8052-161 D31M BlueTop Starting and Deep Cycle Battery 900 amp $$$ 4.2 Buy From Amazon
Trojan T31-AGM 12V 100Ah Group 31 Deep Cycle AGM Battery 100mAh $$$ Buy From Amazon

List of the best battery for trolling motor

1. Odyssey 34M-PC1500ST TROLLING Thunder Marine Dual Purpose Battery

This Odyssey 34M battery product can operate for ten years and is equipped with comes with a cold cranking amp of 880. They are built to have a low operating cost and live a long life cycle.

You can use this battery without a recharge for seven hundred twenty days or two years. It comes with a four or 4-year warranty.

This product is built to be vibration resistant and can prevent shock to the battery. This resistance is what extends the life.

This battery product has been tested in temperatures from -40 to 176 degrees Fahrenheit. You do not have to schedule maintenance because it is maintenance-free, and there is no need for corrosion prevention.

The battery is spill-proof, according to the Department of Transportation.

  • group 34 with tin-plated Sae Posts
  • 3/8-inch positive
  • 5/16-inch negative thread ss stud terminals
  • up to 400 cycles at 80% depth of discharge
  • twice overall power
  • three times the life of conventional marine batteries

2. Optima Batteries 8052-161 D31M BlueTop Starting and Deep Cycle Battery

This Optima Blue Top trolling motor battery can withstand inactivity and extreme temperatures. You can use this battery for storing your boat for fishing in the summer or the winter.

According to verified purchasers, this battery is excellent in hot weather and can stay between charges for along time. Some say that it can go for six years.

This Optima battery is high for storage and keeps a charge even after long periods of non-use.

The in-depth cycle feature makes this Optima battery very popular, especially for severe anglers for larger fishing boats. The power of this battery can turn over a larger motor among tough waters.

  • 12-Volt
  • 900 Cold Cranking Amps
  • Stainless Steel Stud Posts
  • excellent reserve capacity of 155-minutes starting power
  • fifteen times more resistant to vibration for durability

3. NorthStar NSB-AGM31M AGM Group 31 Marine Battery 1370MCA/1150CCA

This NorthStar Ultra-High-Performance AGM31 battery delivers a dependable CCA and turns over fast. You do not have to worry about getting stranded out on the ocean or sea or lake. This battery product will make sure to fire up and reliable you need it to.

You do not need to clean corrosion or check for water level because it is completely maintenance-free. The NorthStar Ultra-High-Performance AGM31 battery can maintain itself, withstand extreme weather conditions, and durable when stored in long periods.

The manufacturer provides a warranty between three and four years. The great thing about this battery is the life cycle and power.

The battery can turn over a much larger motor due to its size. It holds a longer charge.

The Northstar brand is famous for fishing boats that durable and resistant to heat. Compared to other batteries at the same level, this battery product has a faster recharge.

  • Pure lead AGM technology
  • exceptional CCA ratings
  • excellent reserve capacity cycling ability
  • fast starting
  • cycles over 900 times to 50% depth of discharge
  • fast recharge
  • advanced AGM construction
  • approved as non-hazardous cargo

4. Universal Power Group 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery 12V 24V 48V

You do not have to check on the water level of this battery because it is maintenance-free. The strong, robust, and sturdy build lower the risk of vibration and shock regarding excess movement.

The Universal Deep Cycle AGM 100AH comes with a one-year warranty. The battery is made to last between four to six years. You will be impressed by the life cycle of this battery product. The battery lasts all day long and still recharges fast.

  • 12-volt 100Ah
  • SLA/AGM maintenance-free
  • spill proof battery
  • can be mounted in any position, resists vibration and shocks
  • 1-year warranty

5. Trojan T31-AGM 12V 100Ah Group 31 Deep Cycle AGM Battery

The Trojan T31-AGM 100AH battery is designed with exclusive grid technology. The technology allows it to lower the effects of deterioration and corrosion of the battery product.

The Trojan batteries are built to last much longer than lead batteries. AGM technology promotes a reduced operating cost and provides quality charge.

The reality is that this battery lasts long and performs well. It will not get the corrosion even when the battery gets exposed to extreme rain and moisture.

  • 12-volts
  • 100mAh
  • maintenance-free AGM battery

6. VMAX MR137-120 AGM Sealed Marine AGM Battery 12V 120AH for 50lb -110lb thrust Minn Kota

This VMAX Charge Tank MR-137 100AH can live between eight to ten years. It can withstand extreme environments, and it is a durable battery that is strong enough to withstand a beating. This powerful charge battery has a lifespan of eight to ten years.

The heavy-duty grids deliver performance and lifespan after years of discharges. It is recommended to use a high-quality brand AGM charger for this VMAX battery.

In extreme conditions, this battery is sturdy and can withstand extreme conditions. The battery product holds a charge that lasts long enough to stay on the water.

The lightweight trolling motor battery comes with a warranty for twelve months, and you get a replacement within those months. You are required to check the charger and panels to make sure they meet the needed wattage.

Charge the battery for fifteen hours, and it should read over 13.3V.

  • heavy-duty 12V AGM DEEP CYCLE BATTERY
  • float service life span of eight to ten years.
  • Electrolyte Suspension system VMAX tanks
  • heavy-duty grids provide an extra margin of performance
  • maintenance-free operation

How to maintain your battery for trolling motor

  • Charge a full charge and do it after every use.
  • Avoid high voltage fast charging cycles. Use the recommended voltage requirements. It would be best if you unplugged after the charge is complete right away.
  • Use a charger with Multi-Stage Charging for a fast and safe charge.
  • Avoid storing in very hot or very cold temperatures. Place your batteries indoor over winter and avoid leaving them in scorching temperatures.
  • Clean your battery to improve battery life.
  • Utilize a charger with battery equalization once in spring and do it again once before winterization or in fall.
  • Make sure proper water levels in flooded lead-acid batteries. Fill them with distilled water.
  • Avoid storing uncharged batteries for long periods.
  • Keep your battery terminals clean. Scrub off any corrosion with a paste of baking soda and water and a brush.

By Henricus Bismo

I graduated from the University of Indonesia majoring in Information Technology. I enjoy writing reviews of many products because it gives me excitement and inspiration.