Abstract: A portable module that provides an interface between alternating current wall outlets and appliances for the purpose of maintaining an appliance in a quiescent state for a preselected period of time if the alternating current power at the wall outlet fails. The module includes a battery and a direct current to alternating current low power inverter that are effectively out of the circuit when AC power is being delivered to the appliance but which are brought into the circuit when the AC power to the appliance is interrupted. The inverter supplies enough power to keep digital clocks or other low power-requiring auxiliary units contained within the appliance from stopping so that they need not be reset if the outage is brief.