Originally posted by Splais
I have read and learned so much lately that I am now thoroughly confused. So, someone please answer this very basic question about your basic 4.8v Nicad/Nimah batteries. Regarless of charger, regardless of battery - When it reaches full voltage (i.e., 4cells x 1.4v = 5.6v more or less) is the battery now at full charge now matter how long it took (i.e., 5 minutes or 15 hours); and leaving it on the charger beyond this point serves no purpose and may actually damage the battery.
You are correct, once fully charged leaving it on charge longer serves no purpose and can be detrimental to the battery.