Alright guys I need advice. I pulled a Bill Dance and went overboard with a battery. The battery was un-retrievable for about 18 hrs in roughly 12ft of water and with the help of a really good friend we finally recovered it. After the recovery I hooked it up to a 55lb thrust trolling motor and it worked, however I hear sloshing around in the battery. The battery said it is accessible for maintenance but I have no idea what to do. Any advice would be great, thanks!