How to Choose Marine Batteries | Types, Sizes and Uses

Confused about choosing the right boat battery? In this video, we simplify the selection process for you! We'll compare flooded lead-acid, AGM, and lithium boat batteries, helping you pick the best one for your needs.

BATTERIES AS SHOWN

00:00 - Introduction
00:15 - Flooded Lead-Acid Batteries
01:10 - Absorbed Glass Mat (AGM) Batteries
02:05 - Lithium Boat Batteries
03:00 - Deep Cycle Batteries for Trolling Motors
04:05 - Battery Sizes: 24, 27, and 31
05:00 - Battery Capacity and Runtime
06:00 - Battery Installation Safety Tips
07:00 - End of Season Battery Care
08:00 - Separate Power Supply for Trolling Motor
08:50 - Conclusion

With our comprehensive video guide, you'll understand the pros and cons of different battery types and make an informed decision for your boat. We'll discuss flooded lead-acid batteries, absorbed glass mat (AGM) batteries, and lithium batteries, comparing their weight, lifespan, and cost-effectiveness.

Discover the importance of deep cycle batteries for trolling motor power supply and learn how to choose the right battery size based on your boat's compartments. We'll also share valuable safety tips for installing and maintaining your boat battery, ensuring optimal performance and reliability on the water.

Subscribe to our channel for more helpful boat maintenance tips and tricks! Don't forget to like and share this video with fellow boaters! If you have any questions, leave a comment below, and we'll be happy to help. Happy boating! 🌊🎣

#BoatBattery #BatterySelection #FloodedLeadAcid #AGMBattery #LithiumBattery #BoatMaintenance #TrollingMotorBattery

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[NormNewsome-qhzs]

Someone tried to scam me yesterday..said I won a reel but had to pay $144 shipping charge..keep you guard up people

[robertlivingston]

Something else to consider is batteries in parallel double the amp hour, batteries in series remains the same as stated. So a 24 volt system is still only 100 amp hour but a 24 volt system typically draws less current for the same amount of work as a 12 volt system.

[Tomc]

Thank you! That’s some good info. The 100 amp thing is really great info. Now I need to check what my trolling pulls in an hour.

[grh]

Great Video. Do you have any information on the battery post protectors you lie to use? . We have been looking to get some but dont know what to purchase. the one in your vidoe looks like it accepts wire ties

[brielslovak]

Can you use one of these to hook up to an ac inverter? Would both the positive and neutral plug into it?

[raycolwell]

I put a 845 marine battery in my dodge Magnum it does great

[alexmoore]

On these it would be nice to know what was paid for each one (realizing every supplier is different, but for a given area, buying these batteries, how much did they cost YOU). Also, can you mix/match these, or should a person only have one type? These are knits of course, but . . . because you're being independent and not sponsored (?), just tell it like it is . . . "I bought these batteries on Amazon, in the fall of 2024, and battery A cost $$$, battery B cost $$$ and battery C cost $$$" as an example. And, is there a minimum size a person should acquire for a trolling motor application, for each type? Thanks, and it was a good video - this is just some feedback . . . Thanks!

[FishingSeattle]

Is there a lithium starting battery? I know most lithium batteries are of the deep cycle type. Can dual bank onboard battery chargers accommodate both lead acid and lithium batteries?

[justafarmer]

Just bought a new boat and in my life ive had 2 different dealers installed trolling motors one one my current boat andnone on my old one used small wores and a 30amp flew and they didn't remove the wing nuts on the battery wich they got lose and melted the wire the nect dealer installed a bugger wire with a 60 amp fuse and regular nuts on the battery so as long as i make sure the connections are tight i should be good to go

[peckerpeter]

There’s group 29 marine battery lead acid deep cycle you didn’t mention. If you’re running more than 12v for batteries (24v, 36v etc etc..)You will need to series parallel, Use bus bars recommended as well as load balanced for charging … Best to look it up as many wire them wrong, which leads to battery failure as the battery as a whole is not charged evenly.


When done correctly lead acid deep cycle batteries can last 10years for constant use, extra preventative maintenance will need to be done on a monthly basis. Like topping off with distilled water if necessary it’s what wind turbine and solar systems have to do.


The lithium batteries need to be fully charged before you even use them. All cells will need to be the same voltage @ fully charged. Also make sure you have a solid BMS.

[teamslaiyans]

Is it ok to run two group31 12v 100AH LiTime batteries to run a Min Kota Terrova 80lb thrust motor

[jkutyna]

The added cost up front when going to lithium iron phosphate for your housebank, is you will generally have to rewire the entire boat. The old 1, 2, Both switches that all boats came with as little as 5-10 years ago that controlled the starter and the house bank are gone the way of the dodo. Now you will be adding in DC-DC charge controllers to connect your starter to your house bank for charging off of the alternator from your diesel, or solar panel array, or onboard generator, or wind generator if you are still rocking one of those in 2023. Every one of those devices will need it's own charge controller as well as a LIFEPO4 is going to destroy your alternator based on how greedily it will suck up current on the charge cycle.

I have never heard of Minnkota brand, but it is well known that Victron is pretty much the top of the market these days for your fully integrated electrical system in a RV or yacht. Swapping out the electrical system on my H33.5 is going to run 10, 000$+ by swapping to lithiums once you account for the two charge inverters and the GX Bus with the displays. Once that's done, you won't have to do it again short of replacing failed electronics.

A big thing of note is that you will destroy, flat out destroy any lithium battery on the market trying to start your diesel up. They're trying but no manufacturer yet has a working solution there. Also, you may still need a THIRD AGM bank as well for your anchor windlass if you have a larger one, as they will draw too many amps for a lithium bank, as well as if you're upgrading one or two of your primary winches to electrical or hydraulic drive.

[dozamm]

Does group 31 100 AH lifeFo4 battery contain more/bigger lithium cell in compare to group 24 100 AH ?

[cy]

Curious if you have to switch out the onboard charger when converting to lithium ?

[CSJiGSaW]

Is charging with a mariner prosport 20 amp model good or bad for the batteries?

[jasony]

Is it ok to run other 12v electronics like lights, live wells, pumps etc with the cranking battery?

[fredgullett]

It might make a spark when you remove the FIRST cable from the battery, cover it with a rag just in case you have a parasite, or something is ON.

[crevis]

I got a marine battery from 2015 and still going

[tjsmith]

Price of the lifepo4 batteries dropped greatly. A 100ah can be grabbed for under 200 now.

[Hunter-kzos]

I’ve had the same 3 lead acid batteries on my 36 volt trolling motor for the last 5 years. Nobody wants to spend 300-600 dollars for one damn battery