Provided is an adapter for an electrical device such as a photographing device. In an embodiment, the adapter includes a base frame, a connector that is disposed in the base frame and can be connected to a power input terminal of the electrical device, and a power input jack that is disposed in the base frame and electrically connected to the connector and can be connected to an external power supply device. In yet another embodiment, the power input jack of the previously-mentioned embodiment is replaced with a power input cord having a plug that is configured to interface with an external power supply device such as an AC power outlet.