Ionics

if u have a brushless trolling motor or a 36 volt system 50ah will be fine. if not i would go with at least 60ah

Two 100 ah lithium batteries. Never stop fishing because your batteries run down. Torture them, and run them hard. Charge before you go fishing, lithium doesn't like to stay at 100%, that will cause them to swell. Game changer, best investment you will make besides spot lock on a boat IMO. I would cry once, and buy once and go with Ionic. I'm using brand X, EG4 for savings and they have been solid but the warranty is half of the Ionic. Note: if you fish a couple days a month, get the wet cell wally world batteries. If you are "mad at 'em" and fish allot go lithium, as you will have to get a new charger for lithium batteries. Noco here, had one fail but they replaced bit. Buddy also had a noco fail early on, but they replaced it as well.

Prosise

OP, a 24v tm draws more amps then a 36v. If you’re hard on the tm all day seriously consider 100a batteries. If you’re just a casual fisherman only using them a few hours at a time then 50’s or 60’s will work.

50’s will last just about anyone a full day on the water.

On a 36v I agree but a 24v draws about 10% more amps. Like I said earlier, I’ve run my 36v down to almost 30% before in a tournament.

Good point on the 24V vs 36V 50ah use.


I have a 36V system and fished 5 days on a river system with current. We were out for 10hrs or so on practice days and they stayed over 60%.

lifepo4 batteries being at 100% will not cause them to swell

If you leave them at 100% for a long idle time it will. Me and my son have allot of lifepo4 batteries for brushless RC cars/crawlers. Overcharging, and rapid discharge current will not be so kind to then. But one thing I have seen is leaving then fully charged for long periods of time is not beneficial. Wet cells don't like low voltages for a long time, as they will get a memory. Lithium batteries rely on a BMS, and overcharging is common. Not debating you drama, just toss I have learned. Would be good to hear what the big guys (Ionic, etc) say about the matter.

Whatever keeps you on the water the longest is the key.

Prosise

I'm just guessing but I'd think a battery made for marine use might differ from a battery used in a RC car in more than a few ways.

If I remember correctly, Ionic doesn’t recommend being charged at 100% for over 6 months. I think Impulse does recommend staying charged 100% of the time. Or that might have been Powerhouse that recommended it, I just know it was said by one of the BBC sponsors, but not Drew.

But who only fishes 1 time half a year. (Excluding the guy in California that’s on here)


Edit: this is from Ionics website.

If you're going to store your lithium battery for extended periods of time without using it, it's best to charge the battery up to 14.6 volts (100% state of charge) before you store it in any temperature between 23°F and 95°F (-5 °C - 35 °C). If you plan on storing for more than three months, a range from 32-77 ± F (0 - 25± C ) is recommended. A partial state of charge is nothing to be concerned about with lithium batteries.

Do you remember what your Millertechs recommend for storage?

Pretty much every company selling marine lithium batteries either recommends storing at 100% or indicate it dos not matter

people should stop perpetuating myths

I’m using a 24v. Ultrex. I gotta admit, I never run it higher than about 7-8…but I have fished it hard for 8-9 hours during tournaments….never gets those batteries below 60%.