I have just noticed that on my NC-50, whichever FT-50 I place in it, the red rapid charge light comes on, but instead of switching to the trickle light, the red rapid charge light begins to blink. This is with one, or two FT-50s in the unit. I read the sheet that came with the charger, but nothing is said about 'blinking' rapid charge light. Does anyone know???? Steve K2OMP