Just purchased a battrey tender and wired in the quick plug directly to the battery. In prior years I've always took the battery off and brought it in for the winter....but when it got warm enough for a day to ride I didn't because the battery was in the basement. So this year I'm going to try leaving it on the bike and plugged into the tender. The battery on my 2010 is much more difficult to get out than my previous 1995. My question is...Do I need to leave it plugged in even during the riding season or just when it's put up for the winter months?