Abstract: An apparatus, system, and method for supplying an uninterruptible power source to a dual power device capable of being alternately powered through either a primary power input connected to a primary power source or a secondary power input connected to a secondary power source is provided. One implementation includes a power input for receiving AC from the primary power source, one or more converter elements operative to receive the AC from the power source, to convert the AC to DC, and to deliver the DC to a power storage element. The apparatus also includes a power storage element that stores at least a portion of the DC delivered from the converter elements. The power stored in the power storage elements is delivered to the secondary power input of the dual power device when the primary power source is disconnected from the dual power device.