US Patent 8984679 Lavatory system

A lavatory is provided. The lavatory includes at least one wash station, at least one electrically operated fixture associated with the wash station, a control system configured to control a flow of a fluid through the at least one electrically operated fixture, a power source selectively coupled to the control system, and a power management system coupled to the power source to control the power provided to the control system. The power management system includes a detector configured to monitor the output voltage of the power source, and a switch configured to electrically disconnect the power source from the control system when the output voltage of the power source drops below a predetermined level.