I bought two of these ports and to my surprise only one port drew 12W and the other around 6W. The description alludes to this statement "12 watts (one port)" apparently confusing "eins" in the singular and "connections" in the plural, which is misleading. In any case, see my photos and the current draw for each port. As shown in the photos, the green LED on the right indicates that the bottom port is consuming more power than the top port. I didn't measure the actual current being fed to the iPad as I didn't want to cut the power cord to do this. The device heats up when charging, so that part of the power mentioned is lost as heat. Also, as mentioned in the previous review, the white wire is negative and the black wire is positive. Much luck
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