An apparatus, comprising: a substrate having a first surface and a second surface different than the first surface; an electrode assembly including a first electrode and a second electrode different than the first electrode, the electrode assembly being coupled to the second surface of the substrate and being configured to facilitate transmission of an electrical current from an external stimulator through a bodily tissue; a power source being compled to the substrate and configured to provide power to the external stimulator; a connection assembly including a first connector and a second connector coupled to the first surface of the substrate, the connection assembly having a first configuration in which the first connector and the second connector are electrically coupled to the external stimulator and a second configuration in which the first connector and the second connector are electrically isolated from the external stimulator, whereby the connection assembly, when in its first configuration, is configured to complete a power circuit between the power source and the external stimulator and a stimulation circuit between the external stimulator and the electrode assembly; and a housing at least partially enclosing at least a portion of the substrate, characterized in that a surface of the housing defines a recess configured to removably receive at least a portion of the external stimulator, and in that the connector assembly comprises a connector support perpendicular to the first surface of the substrate, whereby the first connector and the second connector are arranged on the connector support to have an orientation parallel to the first surface of the substrate. a substrate having a first surface and a second surface different than the first surface; an electrode assembly including a first electrode and a second electrode different than the first electrode, the electrode assembly being coupled to the second surface of the substrate and being configured to facilitate transmission of an electrical current from an external stimulator through a bodily tissue; a power source being compled to the substrate and configured to provide power to the external stimulator; a connection assembly including a first connector and a second connector coupled to the first surface of the substrate, the connection assembly having a first configuration in which the first connector and the second connector are electrically coupled to the external stimulator and a second configuration in which the first connector and the second connector are electrically isolated from the external stimulator, whereby the connection assembly, when in its first configuration, is configured to complete a power circuit between the power source and the external stimulator and a stimulation circuit between the external stimulator and the electrode assembly; and a housing at least partially enclosing at least a portion of the substrate, characterized in that a surface of the housing defines a recess configured to removably receive at least a portion of the external stimulator, and in that the connector assembly comprises a connector support perpendicular to the first surface of the substrate, whereby the first connector and the second connector are arranged on the connector support to have an orientation parallel to the first surface of the substrate.