Went out to ride the 04 Road King the other day and it wouldn't start. I unplugged the battery tender prior to attempting start. The tender light was green. When I hit the started button the bike would spin over enough to start. The battery was purchased on Oct last year ( HD battery). Took the battery back to HD and they charged the battery and said it was good. Came home and put it in the bike and the bike started right up, voltage was reading about 14 volts when checked at battery while running. A few minutes later attempted to start the bike and the battery would not spin the engine over enough to start it. The I checked the battery voltage and it reads approx. 12.7 sitting and when I hit the started button it drops to about 4.5 volts. Checked all battery cables and ground all seem to be good. Please someone help as I am not sure where to check next.