Need some help. In the fall was returning from Vermont back to Michigan. Riding through heavy rain for two days, stopped for gas and when I went to start it, completely dead. Tried again and it started right up. I keep the bike on a battery tender. Two days ago, went for a short ride, stopped and turned the bike off to pick up a friend. Started right up and took what I consider a short ride, walked around a short time. Went to start it and was completely dead, no lights, nothing. Checked the kill switch and everything I could think of. Had to have it towed home. Hooked it back up to the tender,thinking the battery was completely dead. As me and the neighbor were trying to figure it out, tried turning the key a couple of times and had one of the dash lights flicker. Next morning took the battery to the local battery store and it checked out to be good and it was completely charged, didn't have it hooked up overnight. Put it back on the bike, reading 12.79 volts while starting dropped to 11.81 then went up. Kept trying to start all day as I explored everything, it started every time. If anyone has an idea why this occurred, please let me know. I travel alone most of the time and don't want this to happen again.