Steve all battery's are good if you treat them right. I bought 3 deep cycle batteries at walmart close to my boat in a hurry. They are called everlast my friends call them never last. The battery's are 6+ years old and never let me down.I just checked them from the winter 12.6v on all 3. I leave them on the boat all winter with no charge. I do unhook the + lead and leave them fully charged in the fall. I also filled them with distilled water ever spring. I also mounted a battery near the engine just for starting it was a closeout from sams. Charlie