| 摘要 |
An electronic device includes a case and a power supply arranged in the case. The power supply includes a first power port to connect to a power line for supplying power to the electronic device. The electronic device further includes an extension cord to connect to the first power port through a plug; the extension cord includes a second power port to connect to the power line. When the plug is connected with the first power port, the power line is connected to the second power port to supply power to the electronic device through the second power port, the extension cord, the first power port, and the power supply; when the plug is disconnected from the first power port, the power line is connected to the first power port to supply power to the electronic device through the first power port and the power supply.
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