This invention is a battery charger capable of coupling to similar chargers so as to form an effective multi-unit charger that can be configured to a user's needs. The charger includes at least one pocket for accommodating a rechargeable battery pack. The charger is capable of linking to other chargers due to mechanical and electrical connection disposed on the charger. The charger has an external housing that includes a male electrical connector and a female electrical connector that facilitate linking similar chargers in a chain. A mechanical shroud is disposed about one of the electrical connectors, while a mechanical shroud recess is disposed about the other. A hemispherical linking flange extends from one side of the charger, while a linking flange recess is disposed along the other side. The mechanical and electrical connections of this charger allow multiple chargers to be linked together and still withstand the rigorous drop tests required by OEM manufacturers.