96 se. Started easily and running fine until I cut it off to air - up the tires in my garage 300 ft. away and upon restarting I had instrument lights and headlight, but battery appeared dead. I plugged in the charger all night and this morning I can hear a relay clicking but doesn' t turn the engine. I am thinking the battery is bad? ? Battery is 3 yrs. Old. What do you guys think?