Thanks guys - I figured as much. Next winter -what should I do? I have both a trickle charger and a regular battery charger - should I just use the regular 10A charger every couple of weeks or so? or keep the trickle charger attached for longer periods?
Also - how exactly do I check the alternator output? Attach the positive lead at the positive terminal of the alternator and the negative to the other/ground terminal? I assume it should read aroung 13 volts?