Question about Conceptronic USB Hub

This is not really a problem, but the hub's power supply unit does not provide any more power. In other words, it simply takes 7 times longer than with a lamp. Explained a little more simply. One litre of water flows out of a tap every minute. It takes 10 minutes to fill a bucket of 10 litres. With 7 buckets it takes 70 minutes. However, the buttons can be used to switch individual connections on/off. This allows all connections to be connected, but only the desired ones to be activated, as described by Virtualphilip.

I do this now, yes you can but the charge takes much longer
It would be wiser to charge only 3 or 4 lamps at a time.