Wireless Pocket Transmitter, Rechargeable Battery Unit for a Wireless Pocket Transmitter, Wireless Microphone, Rechargeable Battery for a Wireless Microphone and Charging Unit for a Pocket Transmitter and/or a Microphone

A rechargeable battery unit for a wireless pocket transmitter comprising:

• a front side;
• a rear side;
• a left side;
• and
• a right side;
• a top side;
• an underside;
• a first projection in a region of the underside and along the rear side, and at least partially along the left and right sides;
• a respective recess at each of the right and left sides towards the rear side;
• and
• a respective projection in each of the two recesses, each respective projection being connected at a first end thereof to the first projection and extending partially along the recess.

A microphone rechargeable battery unit for a wireless microphone comprising:

• a first end;
• a central portion;
• and
• a second end;
• wherein the first end has:
• a projection;
• an inclined portion;
• and
• a substantially straight portion;
• wherein the central portion is of a round configuration in cross-section between a 4 o'clock position and an 8 o'clock position in a counter-clockwise direction.

A charging unit for charging a wireless pocket transmitter and/or a wireless microphone, comprising:

• a charging shaft having a first shaft portion configured to receive the wireless pocket transmitter;
• a second shaft portion configured to receive the wireless microphone;
• and
• common electrical charging contacts;
• wherein the first shaft portion has a bottom with the common charging contacts and a portion for receiving a bow of the pocket transmitter;
• and
• wherein the second shaft portion has an aligning unit configured to align the wireless microphone upon introduction into the second shaft portion so that charging contacts of the wireless microphone come into contact with the common charging contacts of the charging unit.