A trolling motor is necessary for propelling a boat along the water. Whether the motor goes on the bow or stern, it is a necessity for work. A motor will move the vessel forward and help to steer it in many directions.
The motor needs a powerful battery to keep working. You can find many trolling motor batteries for your model, but it helps to note what might work best for your boat. This guide will help you in finding the best trolling motor battery that fits your use needs.
A battery needs to be useful, but it must also have a size that will fit your motor and boat. The battery’s functionality and its maintenance needs can also be essential to note. You’ll need to see that your battery fits whatever needs you might hold.
The Deep Cycle Standard
A majority of trolling motor batteries are deep cycle models. A deep cycle battery can handle hundreds of discharge and recharge cycles. The key part of the battery is that it is made to be discharged all the way.
This point is relevant to your purchase in that you’ll need to ensure you maintain your battery after each use. The effort includes charging the battery after each use. The battery must also be fully charged before you store it for later use.
The Two Main Battery Types
You’ll come across two types of trolling motor batteries when you look for a model:
An AGM or Absorbed Glass Mat battery features a sealed body that will maintain its charge longer. The electrolytes in the battery are held in glass mats and not in the fluid. The mats feature thin glass fibers that are woven together to increase the surface area for the electrolytes. The design keeps the battery functional while preventing vibration damage.
An AGM battery does not require maintenance. It can also last for up to four years.
2. Lead Acid Wet-Cell
A lead-acid wet-cell battery uses a fluid that keeps the electrolytes in suspension. The fluid features water and sulfuric acid. You will have to add distilled water to the battery on occasion to ensure the battery works. The battery can be harmed if the electrolyte level is minimal.
Lead-acid wet-cell batteries are common, but they only last about two years on average. They must also be kept in well-insulated areas, as they are vulnerable to vibrations.
Factors to Consider When Choosing a Trolling Motor Battery
The voltage shouldn’t be much of a concern when finding a trolling motor battery. A majority of these batteries work at 12 volts.
The battery shouldn’t weigh far too much. You need a lightweight battery that produces power without bogging down the end of your boat.
The reserve capacity in your battery is a measure of how many minutes a battery will discharge at 25 amps until the battery goes under 10.5 volts. An extended reserve capacity means that the battery will last for a while and will not potentially weaken with use.
Cold Cranking Amps
Cold-cranking amps or CCAs refer to the ability of the battery to start in cold conditions. It is a measure of how many amps a battery can produce at 0 degrees Fahrenheit for 30 seconds with a voltage of at least 7.2 volts. The measure indicates how well the battery starts in many environments, although it is more important for people in colder environments to note.
The amperage hour or amp-hour rating is a measure similar to that of how much gas is in a car. The amp-hour rating measures how long a battery runs. A battery with more amp-hours will work longer.
The total amount of time your battery will last for will vary by how much power your boat uses at once. For instance, if you have a 35 AH boat that draws on 10 amps, it would last for 3.5 hours. Meanwhile, it would last for a little under two hours if it drew on 20 amps.
Points For Maintenance
- Always charge your battery after each use.
- Your battery needs to be charged before you store it for later use.
- Always clean off any corroded spots with baking soda. You can use an old toothbrush to wash off these areas.
- A trickle charger may work on your battery while you keep it in storage. You can use your charge to keep the battery from draining while it is not in use.
A Comparison of the 7 Best Trolling Motor Batteries
A Detailed Look At The Top Batteries
1. VMAXTANKS VMAX V35-857 AGM Battery – For Multiple Boat Sizes
This VMAX battery is helpful for when you have a larger vessel that you need assistance in propelling. The VMAX battery uses an AGM body with lead-tin alloys that will add extra performance power. The design works for floating and cyclic applications alike.
The design can work for about four to ten hours. The total depends on the size of your motor and the amount of power you draw off of the battery. The battery works mainly for maintaining the power in the motor, although it does not take much effort for the battery to start.
The 35 AH total means that it has enough amp-hours of power to work with whatever needs you might have for your boat. It starts up in moments and maintains a healthy balance of energy all the way through.
The battery also comes with a 25-pound body. The AGM body keeps the surface area inside the battery expansive, but it won’t add to the battery’s weight.
The terminals also provide an open space for connections. The terminals stick out well enough to where you can clean them off when corrosive bits start to develop. The long-lasting body on the battery ensures that the terminals can keep on working without worrying about anything being too hard to generate or produce.
2. Odyssey 34M-PC1500ST Trolling Thunder Battery – For Heavy Duty Use
Odyssey produces this next battery option as a choice for people looking for something that can last for a while. It’s also ideal for people who operate their boats in various extremes. The Odyssey battery works at temperatures from -40 to 80 degrees Celsius or -40 to 176 degrees Fahrenheit.
The AGM battery requires no filling or extensive maintenance. The insulated body prevents vibrations from developing. The single-piece design ensures no gases will escape from inside the battery. There will be no acid spills either, thus making this model safe for use in your boat.
The battery has one of the longest shelf lives on the market. You can store it on an open circuit for up to two years before you have to recharge the unit. The value is one of the highest recharge efficiency totals on the market.
The brushed metal exterior features a few caps for the terminals. The caps protect the terminals when the battery is not in use. The color-coded covers also ensure you can identify the parts you’re handling.
All of these features combine to produce one of the longest-lasting batteries on the market. The battery works for about three to ten years before it needs a replacement. The battery life is dictated by the amount of use you put into the unit and how much energy you need to draw off of the unit when you propel your boat.
3. VMAX MR127 12 Volt 100Ah AGM Deep Cycle Maintenance-Free Battery – For More Efficient Energy Use
Part of finding a quality trolling motor battery involves seeing how you have something that does not require as much maintenance. This VMAX battery uses a firm AGM body that includes a high-porosity layout. The design absorbs the electrolyte compound well without causing any leaks or other possible threats.
The tin alloy grids are heavy-duty models that provide extra power and energy for multiple uses. The design works for floating and cyclic functions alike. You can keep on using this even when handling multiple discharges.
The lack of leadership in the AGM plates also enhances the battery’s ability to handle multiple conditions. The battery will not wear from shocks, vibrations, or other possible threats. The electrolyte is always absorbed by the AGM, so the design will stay stable and will not entail any hazardous parts.
The total amount of time the battery can last on a full charge is also extensive. You can get the battery working for about 2.5 hours while at full throttle, or closer to seven hours while at medium speed.
The stainless steel electrical hold bolts provide consistent energy. They will not rust or weaken with regular use. The clear designs also make it easy for you to latch any testing items to the top part. It doesn’t take much time to get the unit working well.
4. Universal Power Group 12V 100Ah Solar Wind AGM – For Varied Needs
Universal Power Group makes this next battery option as one that can handle many voltage needs. The battery is a 12-volt model that can regulate itself to work in many situations. The battery works with different totals for standby or cyclic needs. The model works fast when you need power the most, but it can also be lightened up by a bit if you need less.
The heavy-duty model works for medium and large-size trolling motors alike. It responds fast to any adjustments or charges you wish to complete.
The design operates consistently and will not short out any of its cells. It does well in holding its voltage, especially when working at around 11.8 volts. The design keeps a firm hold going without being hard to use. It also takes a brief bit of time to charge, so you won’t have to wait a while to try and make it work.
You do not require much effort in trying to set the battery up. The design fits well in most boats and will start up in most conditions. Universal has even put the customer’s needs into consideration by shipping its batteries charged. The point is convenient and also suggests that the battery will not lose power while it is being shipped out.
5. Optima Batteries 8052-161 D31M BlueTop – For Long-Running Needs
Optima’s BlueTop battery lasts for a while and will not wear out with regular use. The Optima BlueTop battery features a reserve capacity of 155 minutes and runs with 900 cold-cranking amps. The battery starts in many environments and is ideal for people who need something that can last for a while, not to mention will work in chilly environments.
The AGM body resists vibrations, which is critical for when the water gets a little choppy. The stainless steel stud posts also add extra capacity for charging up your battery and making it work in as little time as possible. It also supports up to three times as many recharge as what other marine batteries can handle.
The inside features two lead plates with spiral-wound cells. The plates are in separate parts between a positive charge and a negative one. The tightly-wound bodies allow the electrolytes to stay operational without leaking or wearing. The battery plates also monitor temperatures, critical tolerances, and other factors. The plates will act as necessary to manage new charges or other actions that take place.
The extra versatility in this battery makes it a helpful model for use. You can mount it in any position.
6. NorthStar NSB-AGM31M AGM Group 31 Marine – Provides Extra Power
You’ll enjoy how well this NorthStar marine battery produces extra power when you need it the most. You’ll even get it ready in moments when you’re in chilly or freezing environments.
The battery cycles more than 400 times at 80 percent of its depth of discharge. It also provides a faster recharge rate than what you would expect from traditional batteries. The unit also starts fast in many conditions without being rough.
The battery also features an extended reserve power setup of 220 minutes of reserve power. The body gives enough room to move forward. The 1150 cold-cranking amps also provide enough power for when you need to get going as soon as possible.
The AGM body provides optimal vibration resistance. The parts on the inside will not shake or come apart with regular use. You’ll keep the battery running well without worrying about any leakage or any gases coming out of the body.
The 100 Ah lifespan on the battery charge is one of the most popular parts of this model. The lifespan allows it to stay intact for hours at a time. It is still best to watch for how well the battery starts up and that you keep the design under control without draining the power more than necessary.
7. Trojan T31-AGM 12V 100Ah Group 31 Deep Cycle AGM Battery – A Basic Model For Most Needs
Not everyone needs the most elaborate trolling motor battery. This Trojan battery model is one unit that doesn’t require lots of maintenance, nor does it loser its charge too fast.
The Trojan battery features a 100 Ah body with 177 minutes of reserve capacity. The total is ideal for when you’re going to be out for a while. The unit is also helpful for running for a few hours when you use it at mid-throttle.
The AGM plates are also thicker than what most other models use. By using thicker plates, the design will handle many discharges while keeping the peak current totals in check. The design conserves energy while in use, so it shouldn’t be hard to get the battery running well.
The average lifespan of the battery will vary based on your usage needs. The model can work for about five to ten years on average when you use it well and without harm.
The terminals on the top part are slim in design, but they have enough clean spaces for when you need to attach things on their parts.
There’s no need to worry about vibrations when using the battery. The heavy-duty plastic body on the outside ensures the battery will stay active and will not shift around while in use.