Motorized window treatment

A motorized window treatment comprising:

• a roller tube configured to rotate about a longitudinal axis that defines a longitudinal direction;
• a flexible material that is attached to the roller tube, the flexible material operable between a raised position and a lowered position via rotation of the roller tube;
• a motor drive unit located within the roller tube, the motor drive unit comprising a motor and a housing that is configured to house one or more batteries for powering the motor drive unit, the motor drive unit configured to control the motor to rotate the roller tube to adjust the flexible material between the raised position and the lowered position;
• and
• a first mounting bracket configured to rotatably support an end of the roller tube and mount the motorized window treatment to a structure surrounding a window, the first mounting bracket comprising:
• a stationary portion configured to be attached to the structure surrounding the window, the stationary portion comprising a catch;
• and
• a pivoting portion that defines an opening therethrough that is configured to receive an end portion of the housing, the pivoting portion configured to operate the motorized window treatment between an operating position and an extended position, wherein the end portion of the housing is accessible through the opening in the pivoting portion when the motorized window treatment is in the extended position, and wherein the pivoting portion is aligned with the stationary portion when the motorized window treatment is in the operating position such that the end portion of the housing is covered by the stationary portion, the pivoting portion comprising a stopping mechanism configured to engage the catch to prevent the motorized window treatment from extending beyond the extended position.