| 主权项 |
1. A protecting case comprising:
a protecting case body portion; a sliding case portion comprising an auxiliary battery cell, the sliding case portion being electrically connected with the electronic device, supplying power to the electronic device, and being inserted into/drawn out from the protecting case body portion by sliding movement; an input to receive power from an external power source; a switch to control charging of the auxiliary battery cell when the input is electrically connected to the external power source; and a controller to determine whether to use power received from the external power source to charge the auxiliary battery cell or to directly charge a battery cell of the electronic device without charging the auxiliary battery cell according to on/off states of the switch, wherein the controller may sense mounting or separation of the auxiliary battery cell. |
