This product has two major problems.
1. 2 Amp source is a description of the claims 2amp port and 1 amp is a bridge between two ports it actually, and it totals only. Description of 3 amps cannot provide implicitly claiming, never iPad and smart phones can meet at the same time, such as combination. (Update: the technical details section shows total 2A now, than clearly).
2. 2 Amp provides 0.5 Amps ports to use Apple Protocol USB power port will only appear on most other devices.
Upside-down port provides slightly over, and non Apple device procurement 2amp 0.5 ampere port can be a source if nothing else is connected is 1 amp 2 amps and 1.5 amps. Therefore this product 1 high power can support one's low-power device (port 2 Amp) on non-Apple devices (amplifier 1 port).
Now some background / details.
Background on the USB charging for those who don't know the first few:
USB power specification 0.5 amps at 5 volts... Or 2.5 watts. This is a great up when really power until hungry, especially smart phones and tablet computers are the last several years have gotten the device, lesser extent was a dedicated GPS. These devices are more particularly Tablet iPad, such as 2 amps, ( or if my HP touchpad ) uses.
These device manufacturers, therefore, had a dilemma. Computer prepared 0.5 Amps on had a 0.5 amp, pull the device than if they only source, risked damaging power can be. Therefore, they draw all the power they draw manufacturers 0.5 amps, only bother at that time your device is connected to dedicated charger that came with unknown source or device, whether they can be to determine the needs, doing the trick.
A common trick used in two as it is. In the first short of two data - wire charger is that together. This is most is what non-Apple devices. Drawing all power so older devices or computers would have done this, the device need that safe is possible.
Also know that Apple is like taking different approaches, I don't fully understand is one of the rows of data are open either by the fact that connects to the charging power supply short circuit and how much electricity can know the device precisely because doubt is a sophisticated probably better when you can see.
Taking a good approach, Apple might be a nice concept, but it created chaos in USB charging equipment product category. What to do is the non-specific charger? They cannot support both.
Chose to go the route of ports for this device 2 Amp Apple. Can't say any high-powered Apple device certainly is so suspect Apple devices running well this unit never owned. When I use electronic equipment put under load on this USB charging port could draw a 2 amp. However, but I expected a series of shorts, 3 high power devices to connect I have (HP touchpad (2 Amps) and win Motorola Android phone (0.85 AMPS) and LG Optimus slider (0.7 Amps)) the data were none of them, depicting the current.
Fortunately for my purposes, use short-circuit method of amplifier 1 port data lines on this device. Thus, able to provide all the power of my victory and, wanted the convoy. Saved it denial as a high power charger, for one reason or another HP touchpad connection, if the device only, also it might complete it for some reason, probably HP touchpad charging at 2 amps.
Touch pad will need it, because the touchpad of HP charger, data line shorted could source claims 2 amps surprised me on this to tell the truth,. Why it didn't work not so sure.
Therefore 3-this device will get a star (UDPATE: four stars) so can source claims it (somewhat incorrect 2 A+1 A representation of negative (update: is now clear to the more technical details)), and calculated that the higher claims, could support would be more suitably in falls short has pointed out elsewhere.
Operates port non-Apple device in the device, both for non-Apple users or ( says iPad or Android phone? ) is so mixed, many users after the purchase of this device to other devices "Kensington K33497US PowerBolt duo car charger" better ( http://www.amazon.com/gp/product/B003PU01M4/ref=oh_o02_s00_i00_details ) ( it slope went, see my review over there more ).
We ordered two additional devices.
-"Ultra compact high power dual USB car charger with 2.1 output" (http://www.amazon.com/gp/product/B00470C35E/ref=oh_o01_s00_i00_details)
-"Bracketron universal dual USB car adapter ( UGC-298-BL )" (http://www.amazon.com/gp/product/B0056VNVV8/ref=oh_o00_s00_i00_details)
Hopefully, can provide the device's specs I own two of them.
Update: I was up star reviews four of the two reasons I.
1. Technical change more text to clarify that total power capacity.
2. Are two I kept 4 models to buy it I, it only holds in unmodified form. Is it to count for something. :)
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