I depends on whether it's a "real" marine / deep cycle battery, or just a car battery.

A true deep cycle battery is designed for just what it says--deep cycle, as in, low, long discharge, like running a golf cart, or used in banks for UPS backups or wind/ solar power.

An automotive battery is designed for LOTS of cranking amps for short periods, instead. If you can't tell, take it to a "real" battery place, and by that I don't mean Sears or the nearest xxxx-mart.