Originally Posted by fskof
If you live in a cold climate I would remove the battery from the boat after you winterize the boat and keep the battery in your basement with a Battery Tender Plus on it. I did this since the boat was bought new and my factory battery lasted 9 years
This is the one that I have used on my Boat, Jet Ski's, Motorcycle, and cars : http://batterytender.com/battery-ten...-at-1-25a.html
Unnecessary. The only reason to take a battery inside is to keep a discharged battery from freezing. A charged battery won't freeze until about -60. Keep it on a float charger like Battery Tender and there's no need to do anything else. Likewise, disconnecting the battery is unnecessary since the only reason to do so us to stop parasitic drain, which is irrelevant if it's on a float charger. It's worked for me for much longer than 9 years.