I stored mine over the winter last year (This year it's my daily driver
lovin' it!). The battery was dead when I woke her up so I took it down to Les Schwab for testing and they told me to go ahead and keep the charger on a slow charge for as long as it takes...good battery, my charger is 6 amp (close to 25 years old) and from what the battery techs tell me, slow is good unless your in a big hurry, but sometimes you don't have a choice in the matter, the type of battery will determine it for you. They also told me if I ever stored it again to disconnect the battery and save myself a whole lot of money and bother.