My battery is a year old. My 1987 R65 hasn't gotten much use so far this season and the last few times, I couldn't start it. I put it on a battery tender for a few days and tried to start it yesterday and it wouldn't start. Tried to turn over weakly then just clicking. I have one of those power packs that you can jump start with so I connected that and it started right up. I put it on a different battery tender and connected it to an SAE plug instead of the accessory port to see if the other tender or the port is an issue. Seems odd that a 1 year old battery would be completely dead. Any thoughts or ideas on what else I could look at before buying a new battery?