I have two different Griots battery managers doing the exact same thing on a BRAND NEW fully charged car battery that is reading 12.7 volts on a multi-meter. If your are at all familiar with these kinds of units (same as the Delran "Battery Tender") maybe someone can figure this out. The red charge light never goes out and the green fully charged indicator does not come on after 2 days of waiting. I have used both of these units for the last 4 years and they are working perfectly and I have never experienced this type of problem. If I momentarily unplug the unit for a "microsecond" then it switches to green and the red charge light goes out (just like it's supposed to do). I'm thinking that since the battery has full voltage maybe it never enters the actual charge mode and the red light is only indicating that the charger is plugged into a power supply. Is a Fiaam battery any different from any other kind, this is perplexing ????