Abstract: A device is disclosed herein for converting a battery powered device to electrical power without modifying the original device. The device is self-contained having the approximate shape and size of one of the batteries normally used The device comprises a DC power jack enclosed in the housing which connects two conductive terminals configured to match the shape and size of the battery's terminals. When two or more batteries are needed to power the device, dummy cells can be used to fill the battery compartment. A standard AC to DC converter can be plugged directly into the device without the need of additional equipment. Because the device accepts power from a standard AC to DC converter, it can be used to provide any output in voltage equal to that supplied by the plurality of batteries being replaced.