I don't want to use my laptop's USB ports to power this. Will a dual USB wall charger work?Also will it be able to draw air if used on a bed?
1945201
Wall charger should work. It wont be able to draw air if used on a bed unless you prop the back up with something
1945202
Wall charger should be fine, bed maybe if you use some type of laptop table or prop the back up to allow the fans to draw air.
1945203
Yeah a wall charger will work blperfectly and honestly better than the laptop USB ports. The cable it does come with however, isn't very long. And no, it will not be able to draw in air on a bed
128450
I you have, say, a tablet or phone charger where you can unplug the USB cable and have the AC wall adapter seperate, you can use it to charge this device. Just take the wall adapter and plug a microUSB cable into the device and it will charge (you can use the microUSB cable that comes with e devce or use one that you use for your phone or tablet etc.)
691405
Just connect usb from charger to Mac air to charge, will probably only be good for 1 charge though, laptop needs more power than the smaller devices obviously.
1353784
No. Unfortunately it is a bad design that requires it to be plug into an active USB port on a computer or laptop in order to be charged. If you need a wall charger I would suggest another device.
1389836
The usb port is output power only. It will charge cell phones, mp3 players and other devices that use a usb to charge. So the answer to your question is no.
1554828
Yes, the USB charging circuit in this outlet does use power even when nothing is plugged in. I tested by wiring a Mastech MS8264 digital multimeter in series with the hot lead that powers the outlet. With nothing plugged into the outlet, the multimeter read 0.42-0.44 milliamps at 120VAC. Note that this is not a true-RMS multimeter; the actual power draw was probably more like 0.66 milliamps. That's less than 1/10th of a watt, which might be so little that it doesn't matter to you, but it is definitely nonzero and does add up over time. My review contains some more details about power draw:
664034
Yea so u plug this device into 1 usb port on your laptop and then u can plug in however many usb ports the device u bought has in this case 4 usb and only use 1 on your laptop but since a usb port only has so much power you might have to use a wall adapter in order to power and use all the ports
455910
Just be aware it can't charge laptops the current only goes one way. It comes IN from the USB plugged into a laptop with the micro USB plugged into the side of the charger and it goes OUT the USB port on the end of the charger top the micro USB at the end of the charger. I saw someone complain the charger didn't charger their daughter's laptop and instead was draining power...
1581791
it will work while it is charging. it only provides a usb cord doesn't have a hook up to wall outlet. designed to charge off computer
1246259
My TV has a usb port on on it, so I've been plugging it in there. I haven't tried it in a wall outlet, but I'm thinking it would probably charge it better. As of right now the TV usb doesn't charge it very well and my battery is usually cut by 30 percent when done watching a movie.
589472
Because you devices negotiate with the computer they are allowed to draw more than 1/2 amp. A "Charging USB Port" will only supply 1/2 amp and will shut down if overloaded. Try one device at a time. From Wikipedia " The USB Battery Charging Specification Revision 1.1 (released in 2007) defines a new type of USB port, called the charging port. Contrary to the standard downstream port, for which current draw by a connected portable device can exceed 100 mA only after digital negotiation with the host or hub, a charging port can supply currents between 500 mA and 1.5 A without the digital negotiation. A charging port supplies up to 500 mA at 5 V, up to the rated current at 3.6 V or more, and drops its output voltage if the portable device attempts to draw more than the rated current. The charger port may shut down if the load is too high."
1599695
I've done it from an OLD 0.5A/500mA usb wall charger. Computer usb ports put out 5v at 0.5A/500mA, whereas most newer usb chargers put out 5-5.1v at 1A or more, so the battery may not be able to handle the higher amperage.
1932733
You have an USB charger for PC. The wall charger IF IS THE ORIGINAL ONE works on 120 v or 240 v with only a plug adaptor. (Anyway, is written on the charger the info).
539557
I'm a bit unclear about what you are referring to here, Peter N.; did you mean a USB 3.0 battery powered charger? I would assume the fridge can draw power from any USB source, including a USB battery powered charger, but since IMHO it does not cool adequately when plugged into a computer, it might work even worse when plugged into a battery powered USB charger. I would expect the best results when plugged into a USB wall plug adapter and not very good ones even then.
16524
I think you can take a USB cable that fits into the unit on one end and the other wider end can be fitted into a USB wall charger. Sorry I am no techie as to proper technical terms.
1448028
This is a UN-powered USB hub and is intended for devices which do not draw more than minute amounts of power from the USB port such as printers, thumbdrives, memory card readers. USB 2.0 specs state the maximum power to be drawn off a USB port is 500mA (0.5 Amps). A typical smartphone charger provides twice as much power -- 1000mA (1.0 Amp). Tablet chargers provide even more -- 1.8A to 2.1A.If you want to charge a phone, tablet, portable battery pack, or power a USB-powered device, you need to get a POWERED USB hub. The easiest way to identify one is that it comes with an AC power adapter which must be plugged-into the USB hub. This is a UN-powered USB hub and is intended for devices which do not draw more than minute amounts of power from the USB port such as printers, thumbdrives, memory card readers. USB 2.0 specs state the maximum power to be drawn off a USB port is 500mA (0.5 Amps). A typical smartphone charger provides twice as much power -- 1000mA (1.0 Amp). Tablet chargers provide even more -- 1.8A to 2.1A.If you want to charge a phone, tablet, portable battery pack, or power a USB-powered device, you need to get a POWERED USB hub. The easiest way to identify one is that it comes with an AC... » Read More This is a UN-powered USB hub and is intended for devices which do not draw more than minute amounts of power from the USB port such as printers, thumbdrives, memory card readers. USB 2.0 specs state the maximum power to be drawn off a USB port is 500mA (0.5 Amps). A typical smartphone charger provides twice as much power -- 1000mA (1.0 Amp). Tablet chargers provide even more -- 1.8A to 2.1A.If you want to charge a phone, tablet, portable battery pack, or power a USB-powered device, you need to get a POWERED USB hub. The easiest way to identify one is that it comes with an AC power adapter which must be plugged-into the USB hub. « Show Less
1591570
This model sucks as far as that is concerned get the one off ebay that doubles ad a jump pack and laptop charger. But to answer your question It only charges one at a time. The two ports are a 1.5 amp and a 0.5 amp port either way I have had devices on this thing and they never filled up... they will continue running but filling one up is never really easy... also check into spare batteries for your phone on ebay... they are usually only like $5.00 so good deal...