The Mijing RabbitFix Android USB Charging Detection Board is a professional diagnostic tool designed to intercept and display critical power and data line information between a charger/power supply and an Android device (likely via USB-C). It is intended to help repair technicians quickly identify whether a charging issue originates from the device's port, its power management IC (PMIC), or the connected accessories.

Key Features (Typical of this product type)

• Real-Time Voltage & Current Monitoring: Allows technicians to view live amperage and voltage draw of a connected Android device without disassembling the phone [citation:1].
• Power Delivery (PD) Protocol Analysis: Because modern Android phones use USB-C, this device likely includes a trigger board or analysis function to check if the charger is correctly negotiating higher voltages (e.g., 9V, 12V, 15V, 20V) with the phone’s charging IC.
• Data Line (D+/D-) Detection: Helps diagnose issues related to USB data transfer. If a phone charges but doesn't connect to a PC, the issue could be narrowed down to specific data lanes.
• Bypass or Pass-Through Charging: Typically designed with separate input and output ports to sit inline without consuming significant power itself.
• Inductive Load / Quick Test: May offer a feature to test the power supply's "true" capability under load (ripple and stability).