The i8 Charger feautres eight charging channels and is capable of charging a variety of batteries.The eight channels are controlled independently as the charger detects the battery power level and selects the appropriate voltage and charging mode. Active Current Distribution (ACD) allows the i8 to actively distribute its power among 8 slots in an orderly manner. For instance , when a battery is almost fully charged the charger will divert a portion of its current to charge other batteries. A red indicator is illuminated while the battery is charging and turns green when it is fully charged.