Man, man… I really don’t know anymore.. Now I have my FLSTC Built. 2003 4 years (3 winter) .. and every year my battery breaks down during the winter break.. I had the first battery removed and stored in the basement and connected the charger every 2-3 weeks.. To start the season again installed.. Platt!! The second battery then in winter no longer expanded and also every 2-3 weeks the charger ran.. In spring was also the flat.. Now I have the charger since Dec. . continuously connected and placed on maintenance charge.. Today I go into the garage… 3,4 volts shows the charger.. ?? I also exchanged the chargers… show all 3.4 / 3,5 volts.. Suppose that the battery is flat as well… How do you do it right???? Btw: Charger was a Fritec the first time, the second a CTK and now a single light… Look forward to your experiences.. Mike