USB Power Blocker - Stops Charging, Allows Data Single Pack
This is NOT a data blocker, see 's other products if that is what you need
This is a USB-A male to female adaptor which has the D+, D- and 0V (GND) connected but the 5V disconnected, so power cannot pass through.
Useful for specialist applications such as 3D Printers and Raspberry Pi where providing power results in undesirable effects
Note that blocking charge/power will also prevent data transfer for smarts, tablets and many other devices, so this device will not be useful in those cases.