I think the main point is to make sure your tender or float charger actually turns off when battery is full. When I had 7 different types of bikes in the garage, I would keep them on what I thought was the correct charger. Then I started going through batteries every year. I found out that the charger was, I guess the best description is, "boiling the batteries dry. I found the batteries constantly low on water. Once I quit leaving it on all the time my battery woes went away....as did most of my bikes...