I bought a new battery (fleet farm) on May 30 2011for my boat .I used it that day for a few hours. When I got home I put it on the in boat charger. It took a full charge and I unpluged it. I did not use the boat untill today when I found out the battery was dead. I mean dead, It would not take a charge. The light on the charger was flashing. Which means the battery is no good. The master switch in the boat was off. My question is with every thing still hooked up to the battery ( All boat fuctions, electroics, radio) could the battery be drained so bad as to kill the battery? Or do I have an electrical problem some where. Thanks for any advice