Thx razz, good to know. When u say you've never drained a battery, is that one battery or two? I only have one battery now and am wondering how long they will run both amps before draining. We will sometimes float for 2 hours at a stretch with the stereo on but not real loud (have the same issue with the wife ). Maybe I should upgrade to a higher capacity battery. I'd rather do that than add a second batt. I do carry a portable jump start unit on the boat in case I do drain the batt. Haven't had to use it yet.