Wonder why your device charge slowly? Wonder if your charger, cable or device is at fault?
Compact and easy to carry. Test your usb voltage and current
Working voltage : 3 - 7.5v
Working current : 0 - 3.0A





Option to buy the load resistor
How to use :
Load resistor is connected to the USB Doctor
USB Doctor is connected to your Power Bank to measure the discharge current
(set at 1A or 2A)
Use sample size measurement (ie 1min - 3mins) to measure the discharge current.
Best for users who has technical knowledge on how to use.

CAUTION
Load Resister will become very HOT when in operation



Photo proof that your mail is mailed out.




Option : QC2.0 Qualcomm 2.0
Click HERE or the picture to buy QC2.0 Voltage / Current Detector

DESCRIPTION FOR ( USB CURRENT DETECTOR - QC 2.0 ONLY)
Qualcomm 2.0

New Measuring range: DC 5v - 20v
current: 0-3a (error: ± 1%)





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INSTRUCTION FOR USE ( USB CURRENT DETECTOR - BLUE ONLY)