I was watching the NASCAR race in California today. Jeff Gordon had a battery problem in his car. The crew waited for a yellow flag pit stop to swap batteries. It was connected with a quick release plug. Zip, zip and it was in and out. He didn't even lose a lap.<br /><br />I store my boat offsite on a trailer. I would love to be able to swap batteries that quickly. <br /><br />Is there anything like that available for the marine environment?