A battery pack charger system includes one or more charging ports for charging one or more removable battery packs. A set of indicators may be arranged on a housing, with a subset of the set of indicators being associated with each charging port. Each subset of indicators may output an indication of a state of charge of a battery pack received in an associated charging port of the charger system. A first indication may indicate that the battery pack is charging. A second indication may indicate that the battery pack has achieved a preset level of charge. A third indication may indicate that the battery pack has achieved a substantially full level of charge.