Abstract: A protective cover for a portable electronic device includes a substrate and a heat dissipation unit assembled to the second surface. The substrate includes a metal part and a plastic part combined with the metal part. The metal part includes a first surface and an opposite second surface. The plastic part defines a receiving space for receiving the portable electronic device. When the portable electronic device is received in the receiving space, the heat dissipation unit contacts with the portable electronic device and transmits heat of the portable electronic device to the metal part so that the heat is dissipated by the metal part.

Abstract: A holder for a portable electronic device includes a seat, a receiving member, a thermal pad, and a heat dissipation sink. The receiving member is connected to the seat, and defines a receiving space configured to receive the portable electronic device. The thermal pad is received in the receiving space, and the heat dissipation sink is connected to the receiving member. When the portable electronic device is received in the receiving space, the thermal pad contacts the portable electronic device and transmits heat generated by the portable electronic device to the receiving member, so that the heat is dissipated by the heat dissipation sink.

Abstract: A bracket for supporting an electronic device includes receiving part and a heat-radiating unit. The receiving part detachably receives the electronic device and defines a receiving groove. The head radiating unit is detachably received in the receiving groove. The heat-radiating unit comprises at least one heat dissipating element received in the receiving groove. The heat dissipating elements are positioned corresponding to heat-generating components of the electronic device. Heat generated by the heat-generating components is absorbed by the heat dissipating elements and then immediately.