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Lithium ion or lead acid?

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Curious what everyone is running for they’re trolling motors? I just need a single 12 volt in the group 24-27 range.

( 20’year diesel mechanic/industrial mechanic) I totally know the difference I lead acid and lithium. And know you can’t use the true whole battery on a lead acid. So I was curious what everyone is using. I’m just looking for 2-6 hours of run time and not break the bank

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  • MN Fisher
    MN Fisher

    Do NOT use Lithium-Ion in your boat...those are the type that turn Teslas into fireballs. Boat use indicates LiFePo4 - different chemistry, much more stable.

  • GreenPig
    GreenPig

    I run 3 Duracell group 31 AGM's and they've been flawless for over 6 years. I too have been looking at Lithium batteries. Besides the cost difference, the thing that concerns me is how my boat will ha

  • OkobojiEagle
    OkobojiEagle

    Nothing's been written yet, but I assume you have a dependable fire extinguisher to have onboard.

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  • Super User

I've been very happy with my Might Max AGM 100ah running my Edge-45. I've had 4-6 hrs of intermittent runtime and still come back with 75% or more charge

  • Super User

I use AGM batteries - Duracell Ultra size 27.

Lithium is ideal if you're into weight savings. Temperature can be an issue and I know you're in Iowa.

Make sure your charger is lithium compatible too. Some aren't.

  • Author
7 minutes ago, MN Fisher said:

I've been very happy with my Might Max AGM 100ah running my Edge-45. I've had 4-6 hrs of intermittent runtime and still come back with 75% or more charge

I’d love an edge on this boat. Definitely something I’ll be saving for. Fleetfarm

Had agm also I was looking at.

7 minutes ago, gim said:

I use AGM batteries - Duracell Ultra size 27.

Lithium is ideal if you're into weight savings. Temperature can be an issue and I know you're in Iowa.

Make sure your charger is lithium compatible too. Some aren't.

Yeah temps would be an issue potentially. And honestly I’m not using the outboard or gas can. A lil weight of a lead acid or Ann battery probably would hurt while I’m

On the bow.

  • Super User

I have a motor guide 45lb….. I use a group 24 lead acid. I get 4-6 hr easy. I am on and off on the trolling motor, it it’s not a solid run time test. With that said I’ve never ran out ether.

I went with lead acid because of the cost, lithium are so expensive.

  • Author
6 minutes ago, GRiver said:

I have a motor guide 45lb….. I use a group 24 lead acid. I get 4-6 hr easy. I am on and off on the trolling motor, it it’s not a solid run time test. With that said I’ve never ran out ether.

I went with lead acid because of the cost, lithium are so expensive.

That’s kinda where I’m at. That and availability locally. And I’m just nervous about the lower cost lithium batteries. I’ve seen a lot of mishaps from power tools to vehicles in my industry. And the low cost ones just make me nervous lol

  • Super User

Is the trolling motor going to be your only source of propulsion or will you run the gas motor also?

  • Author
8 minutes ago, Jig Man said:

Is the trolling motor going to be your only source of propulsion or will you run the gas motor also?

TRolling motor will be my sole propulsion.a lot of Lakes here are no wake anyway. And the motor has a lot of issues and is a 1958. So I’m just not gonna fight it

  • Super User

If the TM is your main source....I'd get a pair of 100ah or even 75ah so you don't end up stranded across the lake from your launch point. But carry a paddle anyway, even a cheap collapsible one is better than nothing...and learn how to scull.

This is what I got in Bass Trek

image.png

  • Author
5 minutes ago, MN Fisher said:

If the TM is your main source....I'd get a pair of 100ah or even 75ah so you don't end up stranded across the lake from your launch point. But carry a paddle anyway, even a cheap collapsible one is better than nothing...and learn how to scull.

This is what I got in Bass Trek

image.png

Thanks! It actually came with one very similar to that. Definitely always need a paddle incase. I guess I gotta sit down and look at batteries.

  • Super User

I would (and did) go lithium from the go. You don’t have any lead acid infrastructure or specific need. For a trolling motor, lead acid is ideal because you get the full voltage through the life of the charge. With lead batteries you have a constant drawdown of the current which slows the motor. You don’t have a high power capacity needed for what you’re doing. A basic 12-100ah from LiTime is about $225. A farm fleet AGM costs that and more depending which you buy and the lithium will have more capacity. I assume since you didn’t have a boat before you need to get a charger also.

  • Author

These are very valid points about how lithium ion works. And a good point why I probably need to go lithium.

Yeah my battery tenderness a smart charger. But Noco makes a nice small one. And I’ve used their stuff in the past at work.

  • Super User

I run 3 Duracell group 31 AGM's and they've been flawless for over 6 years. I too have been looking at Lithium batteries. Besides the cost difference, the thing that concerns me is how my boat will handle while trolling with me on the front, if I cut the battery from 189 lbs to 63 lbs.

  • Author
1 minute ago, GreenPig said:

I run 3 Duracell group 31 AGM's and they've been flawless for over 6 years. I too have been looking at Lithium batteries. Besides the cost difference, the thing that concerns me is how my boat will handle while trolling with me on the front, if I cut the battery from 189 lbs to 63 lbs.

See that’s a legit worry for me. I took the outboard off and the 5 gallon gas can out of the back. And me on the bow. I could probably use the weight on the stern

  • Super User
1 minute ago, Joedodge said:

See that’s a legit worry for me. I took the outboard off and the 5 gallon gas can out of the back. And me on the bow. I could probably use the weight on the stern

I think it's a logical concern. Figure with me at 260 lbs, a Terrova 80, and a 15 lb Solix on the front deck. My batteries are in my back seat and reducing the weight it's gonna take alot more of my short shaft out of the water.

Screenshot_20260307_220840_Gallery.jpg

Screenshot_20260307_220942_Gallery.jpg

  • Author
4 minutes ago, GreenPig said:

I think it's a logical concern. Figure with me at 260 lbs, a Terrova 80, and a 15 lb Solix on the front deck. My batteries are in my back seat and reducing the weight it's gonna take alot more of my short shaft out of the water.

Screenshot_20260307_220840_Gallery.jpg

Screenshot_20260307_220942_Gallery.jpg

I absolutely agree. That’s a sharp boat!

  • Super User
Just now, Joedodge said:

I absolutely agree. That’s a sharp boat!

She's my "Precious ".😁

  • Super User
50 minutes ago, Joedodge said:

These are very valid points about how lithium ion works. And a good point why I probably need to go lithium.

Do NOT use Lithium-Ion in your boat...those are the type that turn Teslas into fireballs.

Boat use indicates LiFePo4 - different chemistry, much more stable.

  • Author
5 minutes ago, MN Fisher said:

Do NOT use Lithium-Ion in your boat...those are the type that turn Teslas into fireballs.

Boat use indicates LiFePo4 - different chemistry, much more stable.

I was just looking at the life p04 batteries on Amazon

  • Super User
1 minute ago, Joedodge said:

I was just looking at the life p04 batteries on Amazon

Forget Amazon - Mighty Max has LiFePo4 batteries - and you can order them through Home Depot or Lowes...then you have a local place to take them to if they have issues.

  • Author
6 minutes ago, MN Fisher said:

Forget Amazon - Mighty Max has LiFePo4 batteries - and you can order them through Home Depot or Lowes...then you have a local place to take them to if they have issues.

Thanks! I didn’t know that.

  • Super User

If you want the weight a group 31 agm will give you around 60 pounds. Sam’s club usually has decent prices. With electric power only you need to look for high reserve capacity (rc). I have agms for cranking and trolling motor and a lithium for electronics. I have Hummingbird Solix units and they draw so much that they would kill a 31 agm grave yard dead in 11 months. After 3 in a row the distributor manager said, “This is your last warranty replacement.” Don’t come back. So when it died I replaced it with a 100 ah lithium and a single bank charger. It’s been going great for over 2 years.

  • Author

So that’s good customer service lol. I see both points though. I kinda think the weight may help some? And availability is 3 mins from the house to run to fleet farm. I will have to look at the reserve capacity.

Man that is some heavy draw on there to kill those batteries like that. That’s nuts.

  • Super User

An AGM will give you similar weight of a lead acid without the maintenance. No checking water levels. And they will have a longer lifespan too. You can use a standard charger with AGM batteries.

  • Author
5 minutes ago, gim said:

An AGM will give you similar weight of a lead acid without the maintenance. No checking water levels. And they will have a longer lifespan too. You can use a standard charger with AGM batteries.

That’s is an excellent point.

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