Patent ID: 8103886

Claim:
A electronic device comprising: a rechargeable battery; a connector comprising: a power supply pin used for supplying power from an external device and for detecting whether the connector being connected to the external device; a ground pin; and two signal pins used for transmitting data between the electronic device and the external device; a controller for controlling charging of the rechargeable battery, the controller being configured to judge whether the external device is a predetermined power supply apparatus based on a state of the two signal pins when the external device is connected to the electronic device via the connector; and control communication with the external device via the connector so that the rechargeable battery is charged by a first current from the external device; an operation unit; a storage unit; and a playback unit capable of playing back content data stored in the storage unit based on a command from the operation unit by using power of the rechargeable battery, wherein the controller controls communication with the external device via the connector so that the rechargeable battery is charged by a second current from the external device when the external device is not the predetermined power supply apparatus, the second current being greater than the first current.