Trolling Motor Battery Showdown! -Lithium Iron Phosphate Batteries (LifePO4)

In today’s video I will performance test the LiTime 50ah Lithium Iron Phosphate Battery (LifePO4) as a trolling motor battery. My trolling motor is a 30lb thrust Minnkota trolling motor.
As a bonus today I am also reviewing the Eco Worthy 50ah Lithium Iron Phosphate Battery (LifePO4). I used this brand of battery as a trolling motor battery for my Seahawk4 inflatable boat in a previous video and the battery failed. The company sent me a replacement battery so I will test it out! Which of these is the best lithium iron phosphate battery for a trolling motor? How long does a lithium iron phosphate battery last when powering a trolling motor? How do these batteries perform as a trolling motor batteries?

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[MrFredsDIY]

What are your thoughts about these two batteries for a trolling motor? Do you think one is better than the other? Let me know in the comments below.⬇️

[BarnabyWild]

Great presentation. Bringing all the receipts. Nice stylized production too. Answered my questions about what distances to expect.

[rsabotage]

Great video. This video is exactly what I was looking for. I have both of these batteries in my Amazon shopping cart and i was undecided...

[VoyagingVoyager]

Thanks for the real life usage review. All of you doing your li time “unboxing reviews” where you read the owners manual to everyone, take note. This is how a battery review is done. Excellent job sir. Just bought my li time 50ah to run electronics.

[retiredguyadventures]

I just bought a LiTime 12 volt 100 ah LiFepo4 trolling motor battery for my boat and camper. I tested it today in the boat which is a Scout 162 Sportfish. It is a bay boat and even though it is only 16 foot it is quite heavy. I ran the trolling motor hard for 2 hours through a lot of water vegetation and against a still wind. It never went below a 99% charge, and after it rested on the way home a half hour latter it was back up to 100%. No lead acid or AGM battery I have ever owned would stand up to that usage. This is the first LiFepo4 battery I have ever owned and I am beyond satisfied. I can only hope it passes the test of time, but it has a 5 year warranty and is rated for 4500 charges... This truly is the battery technology of the future.

[nava]

Love your videos!!
Make a cool battery box !!

[tcz]

About 50 cycles on my Eco-Worthy battery. No problems. Love it.

[joecam]

Li Time customer service is fantastic! For that reason alone I would pay the extra for the Li Time battery.

[skipro]

I just purchased the 100ah version of the Eco-Worthy battery during Amazon Days for $172 each (pack of 2). That's less than you paid for the 50ah version in your test.
I also bought a 50ah version, like yours, on eBay in January, for $90, which is half off the price you paid for yours.
The point being, is that the cost for the Eco-Worthy is rapidly coming down and are now below the cost for a quality lead-acid battery.

[TheCompjunkie]

@MrFredsDIY

I found this video very intresting as well as surprising. I did a very similar project to this last month.

Here in canada, those batteries on our amazon are over $500+, so not exactly cost effective compared to the lead acid marine batteries.

I chose to go the DIY route.

I have an existing 52V Battery from E-Bike, that is 13ah. This is 14S system as opposed to your 3S battery in your video, but much smaller amp hour.

I connected the 52V battery (58.8V when fully charged) to a DC to DC step down converter that is 12V, 30Amp capable (actually outputs about 13.2V at all times).

I then added a 30Amp circuit breaker between the 55lbs thrust minn kotta and the dc to dc converter.

52V Battery > dc step down > 30 Amp inline breaker > minn kota battery center box > 12V 55lb thrust minn kota motor

The entire setup weight 9lbs (a milk bag) and is super efficient. I added a secondary voltage meter to thr box to show the realtime voltage of the battery itself.

In my last run on the lake, i used battery for almost 3hrs, and only turned off motor maybe 3 times. Fully loaded boat with 2 adults and a child + gear. We averaged speed 4 on windy day to break waves and hualed back to shore in speed 5. We returned we 53.9V on battery after 3 hours, effectively only using 30% of the battery, leaving us with 70% remaining. The dc to dc converter has a min input voltage of 48V anyways, so thats a nice safety shutoff for the battery, and also BMS shuts off at 20% of thr e-bike battery as well.

It seems my burntime was much higher than yours with only 13ah, opposed to your 50ah. I belive this is due to the higher voltage achiving the same overall wattage with much less ameperage draw on the battery. Its much more efficient to have higher cell count.

Thanks for video! Def educational.

[computergardener]

Excellent video... I still have a lead acid in my boat and thinking about moving to a lighter weight battery...

But while I don't run it full blast, I get two plus hours regularly on the 40lb thrust motor. I guess short term I will keep it.

Another question, do you just attach the fuse to the positive terminal only and then just leave it hang off the edge?

[Samanphotography]

Thank you for your video, I wanr to buy a marine 4 intex, and it is much heavier than yours, with the same 50ah battery and motor, do you think that it will fit ? And if so, how much do I go with it?

[crazyobservations]

Sometimes if a batt wont recharge, try different chargers. I don't know why but some chargers work better on restarting a lifepo4 than others.

[FRENCHXPLORER]

Hi Fred ! Thanks for your video. Do you know about the consumption in watts/h of your electric boat engine ? I have the same intex boat with a Rhino vx 54lbs . In the specs, its written 360watts/hr at the 5th gear which is the max.
Also, how was the difference with the wooden support you have put ? Did you notice any change ? Thanks again for the cool video :) greetings from France.

[Hmmmppffff]

Still not the expected runtime...
But at least better the defectiv Battery :D

Motor: 30A*12V=360W
Batter: 50Ah* 12V= 600Wh
Runtime: 600Wh/360W = 1, 66h

The shutoff at 11, 6v should only cost 5-10% capacity at Max.

Peukert effect should be minimal at a discharge rate around 0, 6C

[chuckpeter]

On the battery that wouldn't recharge, did you try jumping it with another 12v battery? That might give it the bump it needs to recharge. The chargers won't work sometimes if the battery is completely dead.

[Cheechsboss]

I am a SGU resident and go to a Quail in Sand in Hollow a lot have a lifetime tamarack with a white snake 18. I have a little 10 amp battery that last about 15 minutes to a half an hour so I’m going for another battery 50 A or more but I still don’t know which ones the best they all seem to say LifePro 4

[turnersawman]

I use my jackery to power my trolling motor. Works fine, and i have on board power. 2000 watt hours lasts for 16 hours by the numbers, but i go around all day and only have ever used it down to 45 %.

[timtation]

I’ve run a lot of Wally Worlds biggest deep cycle marine batteries on trolling motors and had them last all day. 200+ times per year, and they each lasted for several years (I did a lot of fishing). For a $120 battery (heavy as heck, but durable)… I considered it money well spent… I have yet to use one of the new LiFepo4 type batteries… But I suspect some of the bigger ones might deliver a decent bang for the buck… At least from what I am seeing, I think they might be very comparable…

[practicalguy]

You should wire both of them in Parallel and see if you gain efficiency. 2.6 plus 2.6 miles = 5.2 miles. Maybe you get closer to 6 miles since the batteries would be more efficient with less resistance.