Yes, you can use a DC-DC boost converter to increase the 5V DC voltage to 19.5V, but you need to pay attention to choosing the appropriate converter power and current output. In addition, the current after the boost will be reduced accordingly, so it is necessary to consider whether the required current meets the requirements of use.
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DC to DC power converters, of course, require a little electronics knowledge. There is also a simple way to forward series 5 1n4001 on the power supply pole, and add an electrolytic capacitor:
According to the principle of the transformer, after the transformer winding has a suitable ratio, the usb5v boost 19.5v can be