Battery storage question

This may have been brought up before, but I have a storage question. When I get back from FL in Dec, I'll be putting the boat in storage after winterizing it. Previously, I've taken the cranking battery out of the boat and put it in the basement on a trickle charger, but I've left the two trolling motor batteries in the boat. This season and last, I've had no issues with the trolling motor batteries (new in 2016). What I've been considering was to leave all 3 in the boat. Would wintering in the boat have an adverse affect on the cranking battery? At my age, it's a real pain to remove all the spaghetti wiring again just to get it out, but I'd like to have it working again come springtime.

I would say remove all batteries and top them up a couple times thru the winter..

This is jut me, but I believe that as long as you give them one final charge for winter, I do a trickle charge so it charges them nice and slow, I find that if I leave them in the boat over the winter, they seem to drain slower at lower temps, thus, not having to charge them a few times throughout the winter, which I don't believe is good for them as I figure it would weaken the cells faster. So basically, give them a nice slow trickle charge until there 100% than just leave them in the boat throughout the winter and you should be good to go until spring. That's just my routine and they seem to do fine. Hope this helps.

That's what I was thinking as well. The cells are in an acid solution, so the solution shouldn't be freezing up over the winter because it doesn't get THAT cold here. They will all be fully charged when I get back from FL so that's not an issue.
Appreciate the info.

https://www.agriculture.com/machinery/maint...ugh_567-ar50925

Wow....

Good read Dave. We've always stored our batteries indoors over the winter and would charge them a few times.

I have sold my Searay which I stored on property with no power so I always removed the batteries. Now I have a Lund Tyee which has 3 batteries and an on board charger. I was thinking of leaving them in the boat for the winter and keep the charger plugged in. Will that work? Or plugin the charger once a month for a day?
The article was for batteries not connected to a charger so this is a bit different.
Thanks.

I charged my cranking battery to full and left my deep cycle batteries on the built in charger.
Left them in the boat in the cold.

I pull mine out and keep them in the garage. I check them once a month (give or take) and top up the charge if needed.

x2 This is what I do.

It may be a pain in the butt, but I believe you will get longer battery life if you remove them and keep them topped up over the winter


I got a total of 8 of them cranking and deep cycle and 6 of them are pushing the 10 year mark. all are Interstate

I disconnect cranking and leave trolling batteries as is. All 3 left in boat in a storage facility that is not even temp controlled. Haven't had issues and have done this since 2013.

I pull mine and leave them in the garage all topped up. They sit on trickle chargers and charge when required.