Replacing 1 Lithium Battery in 36-Volt Series

Hello all – I’m hoping you guys can provide some feedback for me. I have (3) Tracker Lithium 100ah Gen 1 batteries in my boat that are wired in series to support my 36-volt trolling motor – they are from 2021. One of them went to crap – had it tested and it’s toast. I’m the second owner of the boat and the dealer is saying that it’s out of warranty. Apparently, the Gen 1’s only have a 3 year warranty.

I need to replace it and some of the research I’ve done says that you should replace all of them. Does it really need to be done or is it overkill? I’d hate to part ways with 2 good batteries, especially with how expensive they are. Bass Pro sells these batteries in a Gen 2 version, group 24 size. My current batteries are group 31, but it looks like the Gen 2’s in the group 24 size match my current battery’s capacity. Everything matches (brand and capacity), except it’s a size 24 vs 31.

I’m interested in hearing anyone’s thoughts.

Thanks!

3 years is junk…most are 5 or more and some up to 11. If you have to replace all 3 I wouldn’t use their brand again.

I’d call Norsk or Dakota and ask them. I know it’s ok to replace SLA as long as they are the same type. Not sure why that wouldn’t work with lithium.

I would buy 3 Li Time batteries for almost the same amount of money as one tracker battery.
Then try and sell the 2 you have to someone that only needs 24 volts.