I am winterizing my boat this year for wet storage (in water) and had
a question regarding my wet-cell batteries- I have 2 of them. I live
in NY and it gets below freezing here in about a month so I am
thinking its not a good thing for them to freeze. Should I leave them
in with the battery charger going all winter? I have a 3-stage
charger that keeps a trickle charge on them. I have an old shop
battery I could swap in to keep the bilge pump running (if need be).

Any thoughts? Thanks for the feedback.