USB 2.0 Type A Female to 2.54mm Raspberry Pi GPIO Power Cable - 15cm
Feed other USB devices from the Raspb erry Pi GPIO header pins. Including other Raspberry Pi. If you want to use a single USB power adapter to feed the Raspberry Pi as well as other devices, this is a solution for you. Just connect the red cable to to pin 2 of the Raspberry Pi GPIO header (5Vdc) and the black cable to pin 6 of the GPIO header (GND).
BEWARE if you make the wrong connections you could cause a short circuit and you could end up damaging your Pi and other devices connected to it, including the power supply!
Look at the second image that show how to make the connections properly.
We won't be held responsible if you make the wrong connection.