| 摘要 |
A power supply apparatus includes a universal serial bus (USB) cable, a charging cable, and a regulation resistance. A first terminal and a second terminal of the regulation resistance are connected to a power pin and a ground pin of a USB interface of a personal computer respectively via the USB cable, a third terminal of the regulation resistance is connected to the charging cable. The power supply apparatus can be utilized to offer different output voltages in accordance with different external devices.
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