When I discovered by accident this power strip I was totally thrilled. Exactly what I was looking for. But unfortunately came the disillusionment rather quickly. After the first week I was only awakened sporadically from my phone, usually the battery was empty in the morning. At first I thought it was up to the USB extension and tried it only once without. But the same problem. I suspected my phone battery was broken, but after I had plugged my old power cord back into the power strip my phone was morning again fully charged. Then I tested it once with my little 8 year old, mp3 player. The loads, but instead as normal in 2 hours it is not full to more than 8h. I'm no electrician, but on the values ago I would have expected that my phone is charged. Unfortunately was not. Perhaps my mistake.
If I had come more quickly to the power strip as the cause I would have probably returned. The socket itself is well made, but so, unfortunately, to use for me as 3x power outlet, and that I could have have cheaper.