Loose connections can hereby also notice because the display performs felt 5 to 10 updates per second and therefore lighter wobbles are quickly visible.
Incidentally, 9V Charger initialize the switch from 5 to 9 V via the data channel: Output 1 is insufficient this further, Output 2. It is followed by a 9 V battery charger to a 9 V enabled device on output 1, one has on both outputs 9 V (clear) and thus can not charge more than 2 output a non 9V enabled device (!!). One exchanges, however, the connections, both devices get 5V allowed. Caution is otherwise obtained freshly baked electronic waste.
Ideal for all who see rather believe instead, and suspect.