Well cold weather brings out the best in a battery and with the morning temp at 0F/-18C I could not start my Zed the other morning. I hooked up a battery charger and switched it to the 50 Amp boost mode and then started with no problem. A quick trip to my dealer and they confirmed that the battery had failed and would be replaced under warranty. About an hour later I was on my way with a new battery installed. As I am approaching the end of the standard warranty this was in one way the best time for the battery to fail as I now have a brand new battery which should be good for a number of years... 
