Went to start the boat, just to make sure all is fine for the first journey of the year . And what happens motor turned over a few times and dead battery. Now my questions is. What the difference on the batteries. A 27, 27, 29, some have letters after the number. All mine says is 24m-hd, 500 cca, 625 mca. Seams west marine doesnt carry them. But walmart does. Should I worry if purchased form wally? Or should I wait u til tuesday and try to find one else where. Want to get out tomorrow.