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#1060107 - 07/25/22 10:49 AM Speaking of Boat Engine Batteries -
20 Gage Offline
Juvenile at Sea

Registered: 02/15/21
Posts: 204
I know that a year or so ago, there was some talk here of Lithium Ion battery usage for electric boat motors like Minn Kota bow mounts, and others. If memory serves, Dakota Lithium was mentioned, and there may have been others. Anyways, do any here use the lithium batteries for their trolling motors?

I’m a Minn-Kota - Rip Tide - iPilot user, and am looking to buy a new trolling motor battery, and the super lite weight lithium options look reel inviting, especially after dealing with some Group 27 lead acid monsters for the last few seasons.

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#1060111 - 07/25/22 11:56 AM Re: Speaking of Boat Engine Batteries - [Re: 20 Gage]
Todd Offline
Dick Nipples

Registered: 03/08/99
Posts: 28154
Loc: Seattle, Washington USA
http://www.piscatorialpursuits.com/forum/ubbthreads.php/topics/1043666/1.html

That might be the conversation from a couple of years ago, FWIW.

Fish on...

Todd
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#1060112 - 07/25/22 12:24 PM Re: Speaking of Boat Engine Batteries - [Re: 20 Gage]
slabhunter Offline
River Nutrients

Registered: 01/17/04
Posts: 3717
Loc: Sheltona Beach
I use a li0n a couple of days per week. Takes a special charger. Fast charges up to 80% then slows for the top off.

I use the electric to steer the bow, have a fin on it as well. I have an electric start kicker for thrust. But it does not rev high enough to charge.

Battle born.


Edited by slabhunter (07/25/22 12:30 PM)
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#1060134 - 07/28/22 10:17 AM Re: Speaking of Boat Engine Batteries - [Re: 20 Gage]
snit Offline
Three Time Spawner

Registered: 03/08/99
Posts: 1839
Loc: Wenatchee, WA
Have a 36v MK Ulterra, with (3) Cabela’s Group 30 AGM batteries. For the last 3 years I’ve “almost” made the change to liOn’s; with cost being the main deal breaker, along with the need for a special charger, plus (depending on brand) specialized conditions for cold weather applications. A lot of my boat use is in the winter in Eastern Washington, and while my boat has a full cover, it lives outside. I don’t want to R&R batteries every time I use the boat, plus the original AGM’s keep performing after 6 years. Once they’re TU, I will move to liOn but I just couldn’t pull the trigger until then.
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..."the clock looked at me just like the devil in disguise"...

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#1060135 - 07/28/22 11:01 AM Re: Speaking of Boat Engine Batteries - [Re: 20 Gage]
20 Gage Offline
Juvenile at Sea

Registered: 02/15/21
Posts: 204
Thanks for the info here guys !

I’m 99% sure we’re gonna do the LiOn this time around. Just wading through all the reel issues , and rumors concerning their usage as a primary energy source for my MK RT bow mount motor has been interesting. Like the ones noted above. Charging should not be an issue as my current charger will do just fine. Ultra “cold” environment issues here should not be a problem either. So there is the higher cost issue that sorta comes and goes. It seems that any US sourced lithium batteries are quite a bit higher in cost than those (most of the rest) from chine.

The stuff from chine is by far the cheapest, and a lot of the different brand names offered are in some cases, all the same battery, just different labels.

It looks like I can pay $400 or $500 for a LiOn that will fit my needs, or As low as $250 for an energy equivalent from an unknown labeled battery from chine.

Then there are rumors of new batteries with new cases and labels using old used LiOm plates from defunct batteries on the insides, so it looks like one needs to wade carefully through the option prior to commitment...

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#1060137 - 07/30/22 12:04 PM Re: Speaking of Boat Engine Batteries - [Re: 20 Gage]
slabhunter Offline
River Nutrients

Registered: 01/17/04
Posts: 3717
Loc: Sheltona Beach
The new batteries are awesome. The thing is to do some math. Try for your trolling motor to be below 85% of your draw capacity. These batteries are supposed to last many more recharge cycles. So one could plan on 1.5-2.0 greater lifetime when the capacity will dip below 80%.
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