Back again with another little tip to be honest i've charged 4 batteries and only just noticed this (shame on me) this only applies to the manufacturers charger not the ultrafire ones - When charging the light goes from red to orangey but the orange will fade as the battery charges - before taking the battery off charge check the light closely to ensure no orange (red led turned orange by the green led showing at the same time) is showing - if you unplug the charger and the led becomes more green than it was when charging your battery it isn't done yet - I have a habit of removing them once i see green - hope that helps someone 