The first product image (with adapter on its side) notes maximum of 0.5 A at 5 V at each port. Has anybody measured the current draw when only 1 device is attached? How about when two devices are attached? The first product image (with adapter on its side) notes maximum of 0.5 A at 5 V at each port. Has anybody measured the current draw when only 1 device is attached? How about when two devices are... » Read More The first product image (with adapter on its side) notes maximum of 0.5 A at 5 V at each port. Has anybody measured the current draw when only 1 device is attached? How about when two devices are attached? « Show Less
811019
No, never tried more than one device on mine. However, the reason I bought mine is because I had a chance to connect to one at an airport. There were four of us on it, and we were all happy. We did not mesure the current draw, but we were satisfied with the way the device was working.
1891970
i am sorry. i meant if you use all ports the time to charge will "increase". it will require more time to charge. the charging is slow.
1891971
i do not have difinitive answer; however, if you read carefully the accompaning instructions in some of these adapters, it reads "if you connect more than one device, the charging is slow.i if you use all ports the time to charge will "increase". it will require more time to charge.
1891972
If it is a 2AMP charger that means when 4 ports are used .5A per port 2A/4 = .5 so if three ports are used 2A/3, two ports 2A/2 = 1A each port
1068869
I can't specifically answer the question but written on the adaptor is: Output: 5V--2.0A Max
663932
Well, although other people have said that "any" input voltage between 3.5V-30V is fine (which is true), there are other things to consider when using the device to avoid damage, such as: the voltage ratio should not exceed 3, in example, means you cannot use 3V to go up to 15V, that will be a voltage ratio of 5. Description says it can supply up to 5A but then it clearly says it can operate at 3A with good ventilation, my personal safe threshold for supplying devices is 50% maximum capacity, so I don't ever use it for more than 2A, this rule of thumb always worked fine for me.
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)
1217689
I think 5V, 1A is low. The supplied adapter has 24 W and the output is 5V, 2A. Maybe the device will be recharged with 5V 1A, but much more slowly
743534
This is something that could be done, but I would not recommended doing so. Each port is designed to support a maximum of 0.55 Amps draw and a total maximum draw for the entire output of 10 amps. If I needed the extra draw for that one camera I would connect it to its own power adapter, recommending a minimum 2A or 3A adapter. The lower the draw you place on a power adapter, the longer it will live. An ideal draw is 50% or less of rated capacity, 75% considered a maximum. Anything more than this you are stressing the components and will have a lower life expectancy, both the power supply and the connected devices. If things were manufactured the way they used to be (dating myself), everything had a large over design factor so the rating was actually 50% of the theoretical maximum. These days too many products no longer have this over design built in, unless you are talking about military or other specialized use products, at substantially higher cost. It is all about "cheap" while giving the illusion of large output. Do what you want, but please consider what has been stated here. Test your camera to determine its actual current draw, you might find it is substantially lower than rated, or not. Also remember however that draw will vary depending upon duty cycle and environmental temperature. Worth finding out exactly what your equipment uses in all scenarios. I am using this power box for a maximum of ten cameras (each rated at 0.5A) so as to not overload or stress any components. My two cents worth.
1442652
There is a 2A fuse in the plug, so the total load across all three sockets and the USB plug is 2A. I was disappointed to find this out since it is very limiting given that a lot of newer devices require 1 or maybe 2A. I tried to see how much the unit could take and put a 10A fuse in, plugged a 5A device on it. The unit started smoking immediately. This is very unfortunate as it is a great unit otherwise, but I think it should be build for at least 8-10A total current.
1473697
Are you sure that the S4 should draw a full 2/2.4A? Those are ratings from those chargers, but that doesn't mean that your S4 will draw that much current. Someone did some tests with different chargers and he never broke 1.3A: http://forum.xda-developers.com/showthread.php?t=2274321 If you have evidence online that the real-world draw of the S4 is greater than 1.3 then the problem is *STILL* with the cable or charger OR the charge regulator inside your S4. It is *HIGHLY* unlikely that the PortaPow is the problem (though not completely impossible). (Oh and sorry about alzyee. There are a lot of idiots in the world.) Are you sure that the S4 should draw a full 2/2.4A? Those are ratings from those chargers, but that doesn't mean that your S4 will draw that much current. Someone did some tests with different chargers and he never broke 1.3A: http://forum.xda-developers.com/showthread.php?t=2274321 If you have evidence online that the real-world draw of the S4 is greater than 1.3 then the problem is *STILL* with the cable or charger OR the charge regulator inside your S4. It is *HIGHLY* unlikely that the PortaPow is the problem (though not completely impossible). (Oh and sorry about... » Read More Are you sure that the S4 should draw a full 2/2.4A? Those are ratings from those chargers, but that doesn't mean that your S4 will draw that much current. Someone did some tests with different chargers and he never broke 1.3A: http://forum.xda-developers.com/showthread.php?t=2274321 If you have evidence online that the real-world draw of the S4 is greater than 1.3 then the problem is *STILL* with the cable or charger OR the charge regulator inside your S4. It is *HIGHLY* unlikely that the PortaPow is the problem (though not completely impossible). (Oh and sorry about alzyee. There are a lot of idiots in the world.) « Show Less
579032
In a circuit, amps = volts / ohms. The PortaPow works well to display volts or amperage using the switch on the device. You can't isolate the resistance of the cable by itself with this device, but as long as the voltage is within USB spec (approx 5 volts) and the current is what the charger and device you are charging call for, the cable is ok. For example, I tested my Samsung smartphone & its charger and got just over 1 amp. I'm happy with the PortaPow and would buy it again.
2034823
It's 2.4amp total. If one device is charging, it would pull a maximum of 2.4amps. If two things are plugged in, they would share the 2.4amps.
2155406
That question is far beyond my level of expertise. I'm using the card in a 9 year old camera that can't read anything larger 8Gb and I couldn't find any 4Gb cards locally so I've put 2 8 Gb cards in the adapter. I disengage one card until I fill one and then disengage the full card and engage the second card. That works well for me. Sorry I couldn't be more help.
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.
287755
Without a clampmeter I cant tell you the exact draw. The packaging doesn't offer this info. What I can tell you is that i have 4 on my tank, along with the light, using a fogger infrequently, and my tv with all the other goodies (satellite, dvd player, soundbox) all plugged into one line with no problems.
59843
Both receptacles on this unit deliver the full 1000W rated power. Some larger units (e.g. 2500W) separate the power between outlets, to ensure that each 15 amp AC-outlet cannot does not exceed this 15 amp current rating. This unit doesn't output more than 15 amp AC though, so both outlets have full access to the 1000W.I've had no trouble drawing the full 1000W from a single outlet on this unit.
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
1274433
guess I didnt think before buying this-- 12v with an2.4 amp out put 28.8watts -- the package saids dual 12w in a circuit either voltage is half or the amperage depends on serial or parallel -in parallel if voltage stays the same the amp draw would be spit. this is confusing-but it advertises 12w per port--- 12 divided by 2.4 =5v- gues I have to get the meter out- kirk saids 24w and 4.8a total-- nowhere is it printed- can check by meter