If one of your 12v lithium's goes down, you can substitute it with a lead acid battery. Its not the ideal situation but it will get you by.

I have read a lot about lithium and everyone seems to really like them. I have 1 of my 12v lead acids going bad and considering moving over to lithium.

Weight and space is not an issue for my boat. The weight of lithium would be nice when having to install them though vs the lead acid.

Right now I have 3 group 27 deep cycle Interstate batteries for my 36v trolling motor.


My Minnkota MK330D battery charger is not rated to charge lithium so I would have to change that also. What brand charger is everybody using on their lithiums?

It seems like everyone likes the Ionic Batteries but what’s everyone’s opinions?

Also do I need to change out the battery trays from my current group 27 size or just put the lithiums in the same trays and strap them down tight?

I really don’t want to spend a ton of money to upgrade everything but I am tired of buying new leaf acids every 3-4 years. And the ionic have an 11 years warranty

3 - 50’s might be fine for you on a 36v system and you can definitely do it for a lot cheaper than Ionics cost. I just prefer to not have to charge for several trips.

Another advantage to lithium, ZERO acid and corrosion to ever deal with. Financial advantage? I’d saw it’s a wash, not like lead acids are getting any cheaper, they’ll keep going up in price.

Not much more than the everstarts.

https://www.litime.com/products/litime-12v-50ah-lifepo4-lithium-ion-battery


Edit: I’m going back to my original answer, no go on the 50’s. I’ve been reading about a few guys being over the amp draw with their TM’s and the BMS shutting down.

3 - 50’s might be fine for you on a 36v system and you can definitely do it for a lot cheaper than Ionics cost. I just prefer to not have to charge for several trips.

Another advantage to lithium, ZERO acid and corrosion to ever deal with. Financial advantage? I’d saw it’s a wash, not like lead acids are getting any cheaper, they’ll keep going up in price.

Not much more than the everstarts.

https://www.litime.com/products/litime-12v-50ah-lifepo4-lithium-ion-battery


Edit: I’m going back to my original answer, no go on the 50’s. I’ve been reading about a few guys being over the amp draw with their TM’s and the BMS shutting down.

So don’t get 50 amp get the 100 amp hr right

A lot of it depends on your trolling motor. If you have a newer brushed model, it might have a low enough amp draw to NOT kick off the lithium BMS. But a few have said that their older fortrex have kicked off a 50’s BMS, while running on high speed. It’s all in what you own.

I have 3 50a Ionic's and neither my old Ultrex or my Quest has ever tripped a BMS in the 3 years I've had them.

There were a couple of guys having issues on BBC, but I think they were using a cheaper brand of lithium.

A lot of it depends on your trolling motor. If you have a newer brushed model, it might have a low enough amp draw to NOT kick off the lithium BMS. But a few have said that their older fortrex have kicked off a 50’s BMS, while running on high speed. It’s all in what you own.