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Dakota lithium batteries for trolling motors

Old 11-14-2018, 07:08 PM
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Default Dakota lithium batteries for trolling motors

Iím curious if anyone is using a lithium battery for their trolling motor. Dakotaís price point for their 12v 50ah battery is $495 and is certified up to 80% capacity at 2000 lifecycles. I asked Dakota which battery should I use for the MK 24V, 80LB and this is the battery they told me I should get. I would need two of them. What do you think?

https://www.dakotalithiumbattery.com...g-motor-vortex
Old 11-14-2018, 07:50 PM
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There is a thread somewhere with a fishing guide that put together something similiar.

Try this thread:
36v Lithium Trolling Battery REVIEW



Last edited by CNC Boater; 11-14-2018 at 07:56 PM.
Old 11-15-2018, 04:11 AM
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Be aware that the MK80 pulls 56 amps on high. The batteries you are looking at say they have a max rating of 30 amps.
Old 11-15-2018, 04:55 AM
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Looking forward to 24 volts @60 amps for 4 hours at a cost of $250 :-)
Old 11-15-2018, 05:59 AM
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Originally Posted by dspencer View Post
Be aware that the MK80 pulls 56 amps on high. The batteries you are looking at say they have a max rating of 30 amps.
thats a good point!
Old 11-15-2018, 07:33 AM
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Until the price comes down I don't see how anyone can justify it unless they just want to burn money.
Old 11-15-2018, 07:57 AM
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If you are on any kind of budget at all you cant but someone has to buy the $1000 VCR so the price starts coming down for the great unwashed.
Old 11-15-2018, 08:11 AM
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Seems like a pair of these would be perfect.
https://relionbattery.com/products/lithium/24v40
Old 11-15-2018, 08:13 AM
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Originally Posted by acme54321 View Post
Until the price comes down I don't see how anyone can justify it unless they just want to burn money.
If you take into consideration the number of charge/discharge cycles lithium batteries are capable of they will never need to be replaced.
Old 11-15-2018, 11:20 AM
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That's great and all but most lead acid 12v batteries have nearly twice the amp hours of that lithium battery and at a fraction of the price.
Old 11-15-2018, 11:42 AM
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I have Lead acid right now and although I'd like it if it used 1/3 the space and weight, I'm not ready to plop that much $ down.
BTW, don't forget that when a Lead acid says 80mAh, you really only want to discharge 40 or your reducing the life. If it does not happen that often that is fine. I'm expecting to replace mine every 4-5 years anyway. Who knows where batteries will be in 4-5 more years?
My laptop batteries are Lithium and they don't seem to last more than 5 years before I notice degradation.
Old 11-15-2018, 01:21 PM
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Everything I have read says that although you get many more cycles from Lithium their big enemy is heat and being stored at 100% charge. Tesla's have a built in charger that wont let the battery fully charge to prolong its life. For best life span you need to store them at 60-70% charge and below 50 deg. but thats not realistic if they are in service so if you store them in your boat in the sun and like to have them charged up ready for the next trip you may not get more than 4 or 5 years out of them no matter how many cycles you have. So if you have a weight critical situation they may be worth the 5x price if not good lead acids will last just as long. They do have one other benefit and that is fast charge ability but that generates heat and will shorten their life.
Old 11-15-2018, 01:35 PM
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Originally Posted by samven View Post
Everything I have read says that although you get many more cycles from Lithium their big enemy is heat and being stored at 100% charge. Tesla's have a built in charger that wont let the battery fully charge to prolong its life. For best life span you need to store them at 60-70% charge and below 50 deg. but thats not realistic if they are in service so if you store them in your boat in the sun and like to have them charged up ready for the next trip you may not get more than 4 or 5 years out of them no matter how many cycles you have. So if you have a weight critical situation they may be worth the 5x price if not good lead acids will last just as long. They do have one other benefit and that is fast charge ability but that generates heat and will shorten their life.
If that is the case, I canít see why I would spend the extra money. My boat is weight sensitive, but I canít imagine spending the extra money if I canít get the life cycles out of it. To me thatís the main reason why it would be important to me.
Old 11-15-2018, 01:37 PM
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Originally Posted by pas View Post
Seems like a pair of these would be perfect.
https://relionbattery.com/products/lithium/24v40
I came across this brand today. Seems like a reasonable alternative.
Old 11-15-2018, 02:28 PM
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These guys have the least expensive 100AH 12V lithium marine batteries. At least the cheapest I have found.

https://battlebornbatteries.com/
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Old 11-15-2018, 02:53 PM
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Quite a few experts here who have no clue what they are talking about. The purpose built marine Lithium batteries are almost all LiFePo chemistry, they will last 2000 charge cycles under aggressive use meaning fully charged to fully discharged at 50% of the rated AH. Which means a battery with a 100AH rating is being ran at 50A all the way to dead and 50A charged back up. You would be lucky to get 200 cycles doing that to a lead acid battery.

If you only bring them down to 50% discharged every time the cycle count goes up to 9000 to get to the same 80% of original capacity.

You can charge these to 100% without issue, they will deliver substantially more AH than a similarly rated lead acid AGM. There are a couple of reasons for that, 12v boats have alternators that charge to 14-14.5 volts. When you turn off your engine the lead acid batteries drop very quickly back to the nominal cell voltage to 12.8v for a new battery, the lithium battery will stay at 14.2v and start discharging from there, they both are useful to 11v or so. So a lithium battery rated the same as a lead acid battery has double the useable capacity. Another thing to consider the AH rating of an AGM is typically the capacity obtained over a 10 or 20 hour period, over a shorter timeframe they will not deliver the same AH.

Here are some quotes from Odyssey batteries website, arguably the best AGM's out there.
"Like an athlete that is both a sprinter and a long distance runner, the ODYSSEY Trolling Thunder/Marine Dual Purpose battery has both massive starting power and amazing deep cycling capability ó up to 400 cycles at 80% depth of discharge."

The rated capacity of Odyssey AGM batteries result from bring them down to 10.02 volts do that regularly and they won't last long at all.
"The following twenty graphs show detailed discharge characteristics of the entire ODYSSEY battery line. The end of discharge voltage in each case is 10.02V per battery or 1.67 volts per cell (VPC). Each graph shows both constant current (CC) and constant power (CP) discharge curves at 77oF (25oC). The table next to each graph shows the corresponding energy and power densities. The battery run times extend from 2 minutes to 20 hours."

Feel free to educate yourselves http://odysseybatteries.com/docs/us-ody-tm.pdf

I put LTO lithium batteries in my boat, went from 692AH of AGM to 320AH of Lithium, saved 400lbs, and guess what even though I have "half" the capacity they rarely get below 13v now, where the AGM's would always be down to the mid 11's. A tiny little 6 cell 8 lb 20ah lithium battery easily started my diesel engines, an equivalent size AGM wouldn't have a chance.






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Old 11-15-2018, 05:18 PM
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I did the review above. Been a few seasons now and my Lithium Pros 36v cell is still kicking ass. I have yet to run it dead. Worth every penny and it was ALLOT of Penny's
Old 02-13-2020, 06:42 PM
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Originally Posted by RiptideCharters View Post
I did the review above. Been a few seasons now and my Lithium Pros 36v cell is still kicking ass. I have yet to run it dead. Worth every penny and it was ALLOT of Penny's
are you running a single lithium pro 36v 65Ah battery on your trolling motor. I just took them on to sell. just installed a Rhodan on a 30cc. was looking at a single 36 or the 3, 12 volt ones. how long will your battery run your trolling motor? thanks.
Old 02-13-2020, 06:58 PM
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Got a Lithium Pro 36V 40ah on a Minn Kota Terrova. Iíd make that purchase again in a heartbeat. The space and weight saved (it weighs a whopping 25lbs) along with the simplicity is unparalleled. Long days fishing (some days 6am-4pm) and Iíve never run the battery down. Trout fishing in the marsh/bay I usually kill the motors so it only charges when Iím running from spot to spot. When wreck fishing offshore Iíll usually leave at least 1 motor running so itís still charging. Steady power is great.
Old 02-14-2020, 03:15 AM
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I purchased Ionic for my trolling batteries. The only brand to go with, in my opinion. You can monitor their status right from your phone.

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