- Hold the button as you insert the meter into the port to select Connected, Quick Charge, or Disconnected modes; let go when the desired mode appears on the display. Connected mode (USB Connect) passes the data wires through to allow communication. Quick Charge mode (USB Fast) connects the data pins to a charge controller that is capable of negotiating with the downstream device for fast charging (including Qualcomm Quick Charge 2.0, if the power source supports it). Disconnected mode detaches the data pins altogether (they are left "floating"). A fourth mode "Zero" recalibrates the zero p…