Tell us about yourself!
I can verify that in my case the DW01 IC was installed backwards. After removing it (by wrapping a copper wire around the ic contacting the pins and applying heat from the soldering iron) and reinstalling it turned 180 degrees the charging circuit was able to charge the light. It is very sensitive to overvoltage and wouldn't charge with a usb charger which was providing 5.2V. Quality control was likely poor and I wonder if other lights had different ICs flipped!