The first thing I do before getting into a review is to check for a buying guide. And if you google for a deep cycle battery buying guide for marine use, you will have absolutely no websites that tell you that properly.
Most of the information on the best deep cycle battery for trolling motor is either useless or simply wrong and misleading.
I know batteries can be tricky to understand, but not one proper article..!
Luckily, I still have my books and the enthusiasm for green energy. And that is where the guide after the deep cycle battery reviews is coming from.
Our top picks
Based on certain criteria, I have some clear favorites. They are-
- Best deep cycle battery overall– Ionic Lithium Ion Deep Cycle Battery 12V50-EP
- Best deep cycle battery for the money (for low power requirement)- Talentcell 12V 24Ah 288Wh Lithium Iron Phosphate
- Best AGM deep cycle battery- Weize 12V 100AH Deep Cycle
And yeah, I always favor lithium on top of anything. Moreover, the cost per watts consumed was a big factor in choosing the best.
Review of The Best Deep Cycle Battery For A Trolling Motor
Batteries are tricky. Hence, it takes some concentration to understand them. Here are the top deep cycle battery reviews.
1st Pick: Mighty Max Battery 12V 55Ah Power Boat Pontoon Electric Trolling Motor
Our first recommendation is a 55Ah sealed lead-acid battery. By its nature, this battery from mighty max is more affordable than most other batteries in the market. However, this is in the upper ranks of the SLA batteries.
So, if you want the best sealed lead battery in a budget, then this is your choice.
Considering all the must-have fishing electronics in a boat, this low-cost battery should last you from four to five hours. I was never able to finish the charge.
This performance is achieved by the AGM technology, which lets the battery’s electrolyte be in close proximity with the plates’ active material.
As it is sealed, you don’t have to worry about maintenance. The size is perfect for boat hatches. However, you won’t have any mounting gear or harness with the battery. Nevertheless, the structure can take hits and vibrations.
You can use them as starting batteries as well. I think it is the calcium-alloy grid that allows it to be the best of both worlds. The glass mat technology also makes it safer to use indoors. So, you can use it in other applications when not out boating, such as tools, solar, power sports, emergency lighting, and security.
Lastly, mighty max has a year of warranty. On top of that, they have a 30-day refund policy that is rare in this market.
- Multiple uses
- Safe to use indoors
- No maintenance
- Great warranty and money back policy
- Durable casing
- Tests in case of a refund take a lot of time
This is a premium product. Yes, I know that the price might seem a bit more than other batteries in this list. But remember that this is a lithium-ion battery. This is the best battery technology that science has to offer.
The whole electric renaissance was brought about by this technology. It was proven to have 5000 cycles in the lab, which should last well over 15 years for even a professional angler. But battle born ensures a conservative 3000 cycles.
With a tough outer shell, the battery boasts a great safety record, which is guaranteed with its ten-year warranty. This warranty protects against BMS failure. Large bolt holes make it hard to over-torque, and it also has a low-temperature disconnect. So, it’s really hard to screw this up.
Now, we haven’t used the battery for ten years, but we experimented on the capacity, and it was a comfortable 1150 wh. But lithium iron is always more reliable.
On top of that, the battery is also made with recyclable materials. And more recycles means less pollution. It is also flexible to use as you can place it on any of its sides. However, keep the top side open because that is where the heat dissipates. But the heat isn’t that much.
Forget the old inefficient days, say hello to new lithium technology.
- No power decrease with the capacity
- Very safe
- Higher quality battery cell
- Can take large loads
- Green energy
- Versatility application
- You are paying extra for safety and reliability
Optima designed it for the title of the best deep cycle marine battery for trolling motor. And it surely is one of them.
It has the marine terminal with the stainless steel stud with a lead terminal. The stud posts are 5/16 inches tall. The battery case is made of polypropylene, which can endure a temperature of 180° Fahrenheit or 82° Celsius.
The AGM battery is, of course, non-spill. And can do both the work of a starting battery and a deep cycle battery for trolling motor.
We found that the battery would last around 2 hours at a constant load of 25 amps. You can also charge the battery faster with a 15-volt constant charger. And the charging time is anywhere from 6 to 12 hours.
Optima has a two-year warranty. However, for professionals, it is a year less. Many other parameters make their warranty policy more conservative such as charging parameters or string battery systems. Nevertheless, the warranty also increases if you are using their chargers and accessories.
- Excellent for marine use
- Fast charging
- Durable casing
- Great warranty
- The warranty policy is a little hard to understand
- Could have been a little cheaper
It is one of the best 100 Ah batteries for trolling motor in a budget because the performance is way more than the cost. The battery has a glass mat structure. And this chemistry made it easy to use, and it has absolutely no maintenance requirement.
The 100 amps are rated at 10 hours on a voltage of 10.8V. But I had seen it working with a much higher voltage. Manufactures say it gives 90 amps in five hours with double the pressure.
It is also good at retaining its charge even in extreme temperatures as high as 40° Celsius. But drops a little when in sub-zero temperature.
Versatility is a big plus for this battery. When you are not boating, you can use the battery in other applications. The maximum discharge here is 800 amps. So, you might be able to do some cranking with it.
Moreover, Weize is showing the ultimate confidence with the 30-day refund policy. And my experience with their customer service was also one of the best. On top of that, they also feature a year of warranty.
- Strong ABS construction
- Not side sensitive
- Great warranty and customer support
- Durable casing
- Some reviewers have noticed that their battery is a bit taller than advertised
This is a package of two. If you need the best deep cycle battery for a 24-volt trolling motor, then this is your option. Both of them will provide you with 200 watts of energy. This is clearly a contender for the title of the best deep cycle battery for electric trolling motor.
You can also hot crank your trolling motor with its 800 amp marine cranking amps along with a deep cycle. The general hot cranking is measured to about 1580 amps. The charging current range of 7 to 30 amps makes it more comfortable to use. on top of that, you have multiple ways to charge it. They are-
- Solar panel
- Charge controller
- Smart charger
I also have a DOD chart from their website. With a 50% regular discharge, you should have nearly 900 cycles. We got that tested, and it was nearly the same, even better, as it was a new battery. The total life should be eight to ten years.
The AGM chemical construction with a military-grade alloy exterior allows it to live a longer life with no maintenance. It also makes it independent of position sensitivity. The battery is resistant to vibration, shocks, heat, weather, and most other dangers of the outdoors.
Like most top brands, VMAX also has a year of warranty. However, they have the edge of exception with the 30-day full refund policy. I haven’t exercised that right, but one rarely needs to
- No case bulging and plate warping
- Efficient power conversion for low resistance
- Marine cranking ability
- Charging efficiency and ease
- Strong material and durable construction
- Two of these can be heavy for some boats
Here we have a very interesting product for you. You see, you don’t need that much power when using lithium batteries as you can extract more energy from them. So, if your wattage requirements and budget are low, you can try this lithium-ion deep cycle battery for trolling motor.
I had the 24Ah one, which was around the 150 dollar mark when I got it. But amazingly, there is also a 12Ah model that cost around 60 dollars. So, Talentcell Technology is making things comfortable for consumers.
However, the cheaper one compromises on safety and convenience. So, 24Ah is the optimum choice. It will give you more than 2000 cycles with no degradation of power quality. Irregular fishers or novices will enjoy this very much. It’s even good for small boats and kayaks.
Another big plus is the power display, which you don’t see in batteries. It shows all the crucial details on the battery. After all of this, the company still managed to make it environmentally healthy and safer than its counterparts.
- Long effective life at a lower cost
- Environment friendly
- Long effective life
- Very popular for the price point
- Very light
- The battery sometimes drops when it nearly reaches a full discharge
The best thing about this brand is that it wants the best for their customers. Hence, this array of low-cost products. However, the battery doesn’t skimp on the quality.
Its biggest proof is the GEL battery. It keeps the charge for longer. Along with the lead-calcium grids, the battery should have a very long life. According to the brand, it should last you about 15 years. Of course, I haven’t used that long, but I am willing to believe them as they are one of the best trolling motor battery brands.
However, they have a warranty for 1 year.
Relative to other brands, it charges very fast with about 20 amps. The terminals are your regular T9 type. The exterior is a solid ABS construction. This shell contains the six cells of the battery. So, it is pretty secure.
This construction also allows it to self-discharge way less than most other batteries of this price. The operating temperature range is 20°C to 30°C. So, you won’t be able to use it under extreme temperatures.
- Best deep cycle trolling motor battery for the money
- Very low self-discharge
- Best charging in currents up to 50 amps and lower
- Versatile application for the great discharge rate
- Very low-temperature range
- Charging amps of 20 amps is lower than other AGM models
This product is good in its ranks. But only get it if you have really low power requirements and need a low-cost, low weight (25lb) option, especially for kayaks. The size is also optimal for small boats and kayaks.
Despite the small stature and power, the battery is the same as those of premium VMAX batteries. That is why it costs more than some higher power batteries.
It has an AGM electrolyte suspension system. The military-grade alloys give it full protection and restrict fumes and gases to escape. It is also resistant to extreme temperatures, weather, vibrations, and shocks. That’s why it is approved not only in marine use but also in air use. Talk about versatility!
The operating and storage temperature is from -4°F to 140°F. However, it has to be kept above 14°F when charging. You can cold crank it at 300 amps, and for marine cranking, you can go up to 390amps.
On 50% discharge, it will give you a total of 900 cycles of life. So, your expected lifetime is eight to ten years. On top of that, the battery also boasts a low self-discharge and a resistance of 1%.
- The best battery of its class
- Higher power density
- Efficient operation
- Many charging options
- I didn’t get any warranty
Yes, Weize again. They just keep hitting that bell of the optimum point despite having many shortcomings. If you test them, Weize always comes first.
For a hundred dollar 55 amp battery, it has all the basic elements you want in the best lead acid deep cycle battery for trolling motor. It has the AGM technology that makes the battery marine proof. You can place it on any of its sides. However, I won’t recommend the top side.
The battery is tough as well. Accidental shocks, vibrations, and high temperatures won’t do any damage to the battery. The strong ABS and calcium alloy grids make this possible.
Lastly, they also have a year of warranty, a token of confidence in the battery market. On top of that, they also give you a 30-day refund opportunity. But I don’t think you will ever need that.
- Easy charge and discharge
- Versatile usage
- Great for marine emergency backup
- Little heavier than expected
Our list pick is one of the top lithium phosphate batteries in the market. And this is the most high-tech battery on our list. I will not call them cheap, but they are cheaper than most other lithium-ion batteries.
You will not need the internet to connect to your app. It uses Bluetooth. And the app also tells you all the details you need for the battery, such as power level, charge and discharge rate, runtime for different applications, voltage, and many other cool niceties. Moreover, you can manage multiple batteries with the app, even if you have them paralleled.
Speaking of management, the battery contains a microprocessor that manages everything that can go wrong with your battery.
Like most lithium batteries, it has 3000-5000 cycles, which should last 8 to 10 years. It also has all the benefits of lithium such as 99% usable capacity, –20°C to 60°C (–4°F to 140°F) operational temperature, 0°C to 45°C (32°F to 113°F), extreme cold detection, lower self-discharge, etc.
It also gives you a five-year warranty and a 30-day return policy on top of all of these facilities. This is something that no SLA battery can do.
- Best size to power ratio
- Best lithium-ion battery for the money
- Bluetooth connection app
- BMS microprocessor
- Long life and better efficiency
- The app crashes sometimes
Deep Cycle Battery Buying Guide
Here is the guide I was talking about in the intro. Hopefully, you will have everything you need to know here.
And, I am pretty sure this is the only worthwhile guide to pick a deep cycle battery.
I hate to say this, but a lot of battery companies don’t show a lot of this information—even some good ones. Everyone will just tell you about the volts and amps of the battery. Things like C-capacity, CCA, temperature, and many other data are missing from their spec sheet.
Now, there are many battery chemistries out there. As we are not preparing for our physics exams, we will just focus on two variants that are the most popular in the market-
Lithium iron is the latest model in the market, and it has only one variant, the lithium-ion phosphate (LIFEPO4). Whereas, Lead-acid has the following variants-
- Wet-cell (Flooded)
I will not get into the details because that deserves an article of its own. But our recommendations are lithium-ion batteries because that is the cheapest and safest in the long term. Only go for the others if you have a serious problem with the budget. Among the other varieties, I like the carbon-enhanced more.
This is the first thing you see in the battery. The amount of capacity entirely depends on your wattage requirement. However, consider 50% of the capacity in all types of lead-acid batteries. You can count 100% of the lithium option.
The capacity could be given in time or amperes. Amps are more common, and they are generally stated for an ambient temperature of 20°C -25°C.
Depth of discharge (DOD)
This tells you the optimum level of discharge that you can have from your battery. You already know that you will hurt the longevity of your battery if you drain it too much. And not discharging enough means you are losing value. So, there is an optimum point which typically varies with the chemistry of the battery.
However, manufacturing efficiency can make a difference. But lithium-ion has no such limits. The discharge amount does not affect it. For other batteries, it is generally 50%.
It is a big problem for lead-acid batteries. However, lithium and most sealed batteries don’t have this problem. Don’t take it if it doesn’t give you clearance for position sensitivity.
It is the loss of electricity during the conversion of energy. You will find batteries with 1% resistance. And it should be that low if you are paying a good amount of money.
Operating and charging temperature
When looking at this category, don’t think of your ambient temperature. Think about the extremes. If you will be working in extreme cold or the extreme heat of indoors or outdoors, see if the battery will take that.
For AGM batteries, the minimum self-discharge amount should be 2-3%, and for traditional lead-acid, it shouldn’t be more than 20%. However, high quality trolling motor batteries will have much better results than that. Lithium-ion should be as low as 1-0%.
Frequently Asked Questions
Here are a few popular questions that outdoorsmen could have-
Q: How long will a trolling motor battery last?
A: In the case of lead-acids, it depends on your discharge amount. With 50% discharge, it should be around five or more years. Lithium-ion should be around 8 to 10 years, no matter your usage.
Q: How often should I charge the trolling motor battery?
A: Charge it before and after every trip.
Q: How long does it take to charge a trolling motor battery?
A: Again, it depends on the battery and charger capacity. For instance, a 15 amp battery will take two hours with a regular charger.
Q: How many batteries does a trolling motor need?
A: It depends on the energy requirement of your boat. If you want 10 watts for 6 hours, which is 60 watts, then your battery should be more than 60 watts. So, if one battery is unable to compensate for that, you will need another. However, it is safe to say you might never need more than two.
Q: Why are Deep Cycle batteries best for Trolling Motors?
A: Here, you need more cycles of charge and discharge which is the job of a deep cycle. General car batteries have surge capability, but they can’t maintain the continuous flow of power and don’t support more deep cycles.
Electronics are not easy, especially when it is a rudimentary thing like a battery. So, finding the best deep cycle battery for trolling motor was not easy.
However, I finally delivered that to you. Hopefully, you will be benefitted.