Advanced tech charger has nice led's that indicate pre-charge test, charging, charged and maintenance mode. Clear explanation on the charger label for each status. Very lightweight unit compared to NiCad charger it is replacing. Has slot to wrap cord around for storage. My only complaint is that it is wider and won't fit into the charger location in the combo tool kit case. The new lithium batteries are replacing the original heavy NiCads that would not hold a charge anymore.