Abstract: A communication device is disclosed. The device includes a body and a speaker. The body includes a protrusion, and the speaker includes a track. The protrusion is movably received in the track for the speaker to move relatively to the body in an axial direction.

Abstract: A mobile phone and a battery-positioning device thereof. The mobile phone includes a body, a positioning device, and a battery. The positioning device is disposed on the body in a manner such that it can rotate between a first position and a second position. The battery is detachably disposed on the body. When the positioning device is located in the first position, the battery is engaged with the positioning device so that the battery is fixed on the body. When the positioning device is located in the second position, the battery is disengaged from the positioning device so that the battery is separated from the body.