I purchased a 1997 Fisher Freedom 200 pontoon a year ago and it came with an old battery. Not sure what the year of production of the battery was since the month and year weren't notched out. We hooked it up yesterday, the stereo ran fine while we were working on it. Went to start the motor and nothing. Not even a small crank. The stereo then started to turn off and on after we tried to start the motor. Is my battery smoked? Should I replace the with same size? 800 CCA and 1000 MCA. I know zero about batteries. Thanks.