without having to take one cable out of my computer to be able to use another. I want the extra ports so besides using a mouse and keyboard, I can use a desk fan, printer, scanner, ab external hard drive and computer stick, etc. However, I do not know if I need a 5 w or a 15 w power supply adaptor or to find out on my computer what would be compatible. I have read that it is better to have an adaptor with the USB hub, so the desktop battery does not get drained. However, I do not know anything about wattage and volts! When looking online, I see that some adaptors come with either 5 or 15 watts. I want to purchase a USB hub with 4 USB 3.0 ports as my Lenovo Desktop computer (Windows 10) which is plugged in to an electrical socket does not have enough ports.
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