: Locate the DC power jack on your electronic device. It is usually a small cylindrical or barrel-shaped socket with a hole in the center for the pin of the power connector.

: Take the plug of the DC power supply and align it with the DC power jack on the device. Ensure that the polarity is correct-usually, the outer sleeve of the plug is negative (-), and the inner pin is positive (+). Insert the plug into the jack firmly but gently. It should fit snugly without forcing it.