I've seen recommendations to remove batteries during winter storage in cold areas like MI, but am wondering whether it is important or not.  I'm getting older, and my batteries in my boat are not easily accessible, so I've been leaving them in the boat, connected to "smart" chargers, and have not yet seen any problems.  I will appreciate any knowledgeable comments. thanks, mick

I was always told to remove, store in a cool dry place, so that they don't freeze. Also to put them on a piece of wood.

 

39 minutes ago, ike8120 said:

I was always told to remove, store in a cool dry place, so that they don't freeze. Also to put them on a piece of wood.

 

OK, but why?

11 hours ago, MickD said:

OK, but why?

It keeps the electrolyte from freezing if not properly charged. 

 

https://www.optimabatteries.com/en-us/experience/2012/09/how-does-your-marina-maintain-your-batteries