If you only use one usb port, do all 4 amps go into that one port?
1292521
The vendor says the power is distributed based on draw, so yes, one port could have 4 amps leaving the rest with nothing (so don't plug anything else in).
98777
Yes, I do it all the time. There are only 3 USB ports, 1 on the left and 2 on the right. But you can plug in a 4 port hub expander if you need to.
1123958
I think, if your USB port has enough power, it will work with one plug. There are versions available on Amazon with only one plug and they do work.
2031087
No. Just two USB ports. One for power & data and another just for additional power.
2116067
The USB port outputs 5V DC, the Amps it can provide is 1A making the Wattage 5.
35887
It uses only 1 - USB port. I have also used a USB 3 hub and it worked that way as well.
613507
This hub does not include its own power supply so the *total* current it can supply among all four of its ports is the maximum the port it is plugged into can supply. For USB 3 ports on desktop computers, that is usually 900 ma (0.9 amps); for some laptops it may be only 150 ma (0.15 amps).So no, it will not supply anything even close to four amps on any of its ports, nor will it supply more than 0.9 amps on any one port when plugged into a normal USB 3 host port on a computer even if the other three of its ports are unused.
305601
good question. mine cuts out with one usb drive but works fine with another. My toy won't work at all unless it is plugged in to power which defeats the portability aspect. :(
866263
I only have one usb port on mine. It is powered with the power switch, goes on and off with the TV.
1112803
pc usb ports typically put out 0.5amps. these power packs can do 1A and 2A, it probably can.
423988
Remember, this is a 4 amp unit. That means that any single device which needs less than 4A to charge, will be charged.... as long as that is the only device attached. If you have other devices attached, they will be drawing some current, usually up to 900 mA for a USB3 device... sooo something like an iPad may not be able to draw enough current. Most other devices should be ok.
1890991
I use this purely as a charger not as a USB hub. The key is being BC 1.1 compliant. I charge an iPad and iPad mini at the same time. It can pump 2.5 amps max across all ports. It will charge all 4 devices at normal USB rates but if you only hook up 2 devices they should both charge twice as fast! (1000 mA rate)
1011959
5 amps. But the power supply is 12 volts, so in reality the USB-devices you connect can pull way more than that since the USB ports are only 5 volts. Remember that volts multiplied with amps equals wattage (so 12 volts times 5 amps equals 60 watts). Nine USB ports providing a maximum of 0.9 amps times 5 volts equals 40 watts, and then you have a charger port of 2.1 amps times 5 volts which equals 11 watt. So in theory, if you fill up the entire device with USB-devices that can draw maximum power from all the ports, the maximal power draw should be around 51 watt, which is less than the power supply provides. Therefore, this hub should never give you any disconnects because of too huge a power draw, which was a frequent problem with my old USB hub.
1127652
Yes, all 12 ports are powered with the same voltage. The current is shared as needed - the sum of the current for each device ( watts / volts) must be less that 2.5 amps or 120 watts - each device takes the power (Watts) it needs from the common 48v source.
128767
As far as I know It will work with any USB device that use a single AMP. The beauty if this device is that it has enough AMP capacity to handle each device pluggeed into it. I am no electrical expert I just know that most USB devices use a single AMP to charge. I hope this was helpful.
1128804
1) I do not know2) Yes3) Yes and No. It comes with 2 cables one for power, the other for Data. It will work in a single USB 3.04) Yes, provided you have the right connector and voltage, Radio Shack can help you out with that.
1930295
No. It has neither the connectivity nor the power. Any single USB device up to 2.1 amps, and 3.1 amps max output for multiple devices.