Optima Batteries

[Moon~Shaun]

What about winter still need to keep them hot, or do you all just leave them in the boat and not worry about charging, being gel cell will they still freeze and bust? May be a dumb question just wondering!
~Moon

[JUSTINHALL]

I have 4 blue tops, 2 for trolling 24v, 1 for cranking and 1 spare for cranking just in case. Never had to use it but I go 30 miles out in Gulf so like to have a spare.
I use mine year round and don't have any problem freezing. On trolling they give more power and last longer for sure. You do need to keep them charged though gel batteries don't recover well if you draw completely then leave set with no charge.

[otis44]

Optima's are absorbed glass mat batteries (agm) different than either a gel cell or obviously a wet cell. I think they are worth their money. The only other thing I would add is if you have them you need a charger set up to properly charge them. Many chargers will come with a switch or something similar where you can designate wet, gel, or agm.