Retrofit remote control device

A remote control device for use in a load control system, the remote control device configured to be mounted over an installed mechanical switch that controls whether power is delivered to an electrical load, the remote control device comprising:

• a control unit that includes a control interface and a housing, the control unit configured to transmit a control signal in response to a user input, the housing comprising an upper wall, a lower wall, and opposed side walls, the housing defining a void bounded by the upper wall, the lower wall, and the opposed side walls;
• a battery that is configured to power the control unit;
• and
• a battery holder that is configured to retain the battery therein, the battery holder configured to be installed within the void defined by the housing,
• wherein the battery holder is configured to be moved relative to the housing between a first position in a lower portion of the void and a second position in an upper portion of the void based on whether an upper portion or a lower portion of the mechanical switch protrudes into the void when the remote control device is mounted over the mechanical switch.