I have purchased six USB Load Tester with Display, DROK 35W 5A DC Electronic Load Tester, for Power Aging, Battery Discharge, Charge Adapter and Power Bank Test.
I cannot get it to negotiate for 9 or 12 volts with QC2 or QC3 chargers.
It gets into a mode where the display slowly show 2. 3. A. F C and then —- What does this mean?
DAT 0 or 1 – what does that mean?
Do you have instructions that explain how to use the controls?