jrcinnh
New Member
Fully charged batteries won't freeze until -90F so if you keep them charged you can leave them on the boat. The risk is if something discharges them. Fully discharged they will freeze around 30F. I just take off the red cables and leave them till spring. They will self discharge but a good battery will still be at 80% in the spring. If I was really nervous, I'd stop by once in February and give them a charge.
BTW it's been a real long time since battery cases were porous enough to allow concrete to discharge the electrolyte through the bottom. Placing batteries on concrete is harmless to the battery. But if you overcharge them, spilled acid will stain the concrete.
BTW it's been a real long time since battery cases were porous enough to allow concrete to discharge the electrolyte through the bottom. Placing batteries on concrete is harmless to the battery. But if you overcharge them, spilled acid will stain the concrete.