2.1 AMPS on both USB ports or just one, or ...?
1537037
The following is a cut and paste of the first sentence of the product description from Amazon..."The Cooper Wiring Devices TR7745W-BOX 15-Amp Combination USB Charger with Tamper Resistant Receptacle and Box is a standard AC duplex receptacle with 2-USB charging ports rated 2.1A." It appears both are rated 2.1A
1537038
The specification sheet from Cooper would lead me to believe it's 2.1A combined for both ports as the MilliAmp rating for teh entire recepticle is shown as 2,100MA, not 4,200MA as it should of both USB ports could pull 2.1A independently. http://www.cooperindustries.com/content/dam/public/wiringdevices/BuyersGuides/RBG/B/RBG-B-Sec-14.pdf
1537039
I just installed on of these, because the way it was written implied 2.1A each. It is *NOT* I checked both outlets and the first was pulling around 900mA, the second around 1,100mA. So that rating is for both outlets combined. Exact same model number.
1537040
I have a couple of these installed, and even though it says 2.1A, my iPhone 6 plus charges at about the same rate as the little 1A charger that comes with the iPhone. In other words it takes about 6 hours to go from 20% to 100%.On the other hand, I have a true 2.1A iPad charger (the big one), and it charges the iPhone in less than 3 hours (20% to 100%). So I am not sure it can truly charge at 2.1A.
1537041
The 2.1A rating on these types of receptacles are total amps that can be pulled from both USB, not separately. That means if you plug in two iPADs they will share the available amperage up to 2.1A total. This is probably closer to 2.5A realistically to get the 2.1A rating.
1537042
Although Cooper's website doesn't specify explicitly, this outlet is most likely 2.1 amps shared between the two USB ports. Most USB power adapters rate their output as a total - that is, the combined maximum current. That means that the 2 USB ports "share" the maximum current supplied by the adapter circuit. So, two iPads plugged in simultaneously would likely charge at slow (overnight) rates, while one iPad would charge more quickly.
608825
You need to plug both USB ends. This way, your external HDD will draw more power than from a single USB 2.0 port.
678831
Two USB ports. And you can use multiple "sections" at once. Meaning you can use the USB port and the plug at the same time
1396249
Most PC's and chargers limit the current to about a 1/2 amp. That's due to the USB 2 spec. There are a few, such as Apple, Kindle, and others, that charge at higher currents. I would have no reservations using this extension at 2.1 A. Go for it.
239856
one on left is 1 amp is for iphone, one on right is for ipad - and yes it can make a difference - ipad won't charge on 1 amp and the 2.1 is too much for some iphones - I take a white magic marker and put a dot on to identifiy the 1 amp
646619
2.1 from the one designated port if used by itself or 1amp from both at the same time. Great piece, really like mine.
1031564
Yes but one will charge at the recommended 1 amp and the other will quick charge at 2 amps.
672884
One is for data, on is for power. Depends on your drive and computer. I only had to use 1 USB port and it works perfectly.
789304
This is what this device is designed for - 2 USB ports give extra power to 1 device.
1348298
No you do not necessarily need to use both USB cables. If you want to use both, then you will need a short extension cable. But I I only use one cable on my netbook
1888538
From their site : " 2.6A output allows you to charge more devices faster & at full rate. " It doesn't specify a per socket or total amperage but I would lean towards the total.
2234878
yes, if its usb powered, guessing t100? cause my t100 charges off of most things, its just slow to charge when under 2.amps
675602
There are many USB chargers, max 2 amps. The 1 amps give a better charge, the 2amps give a faster charge. I used the one that came with my cell phone. All USB ports are supposed to put out the same voltage which is around 5 volts. So anything that will charge through a USB port will work.
650316
No, the most you get from each individual port is 2.4 amps. Or the 4.2 amps using both at the same time.
2022009
It has no 'amps' per se. This is a passive,not powered, hub so it will be able to source no more total current that the USB port that it is connected to.
2031087
No. Just two USB ports. One for power & data and another just for additional power.
2045929
Yes, that will work. The 2nd USB connector is just for power. That's because some older USB ports will detect a power overload if the drive tries to pull all its power from a single port. To workaround that they the Y cable can be used to pull power from 2 ports. Non-anceint USB ports, like 2.0 or 3.0 or from a powered hub will probably work fine if you just plug in the one end of the cable. Try it with just one. If it works, you're good. If it doesn't, the computer will tell you "power overload detected" and the drive won't work, but no damage will be done.