SIGMA DP3 Quattro - Manual (Page 135)

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4
Close the Battery Cover carefully so as not
to pinch the DC connector code.
5
Connect the plug of the AC adapter and
jack of the DC connector.
WARNING!!

While the Busy Lamp is on, please do not open the Battery Cover or
Card Cover. By doing so, the camera will turn off and result in data
loss. This could also cause damage to the camera and/or memory card.

When you have finished using the camera, please turn off the camera
and disconnect the plug from the wall socket.
After taking the DC connector off from the
camera body, close the DC connector
cover as shown in the illustration.