Abstract: Power assisted pull cart adapter unit is useful for converting a standard golf club bag pull cart into a power assisted golf club bag cart. The adapter unit can include (1) a frame including a vertical arm having upper and lower ends; and, directly or indirectly pivotally attached to the vertical arm below its upper end, a lower arm having a proximal end which is so attached to the vertical arm and a distal end; an upper clamping mechanism for securing an upper portion of a frame of the golf club bag pull cart, which is attached about the upper end of the vertical arm; a lower clamping mechanism for securing a lower portion of the frame of the golf club bag pull cart, which is attached about the distal end of the vertical arm and which can pivot with respect to the lower arm; (2) a power unit attached to the frame; (3) a wheel set having an axle, attached to the frame and drivable by the power unit; and (4) a power unit controller in communication with the power unit.