Update - Htrc T240 Duo Firmware

If your PC does not recognize the charger, try a different USB port (preferably on the back of the motherboard if using a desktop) and ensure you are using a data cable , not just a charging cable. YouTube description technical manual Do you have a specific issue

. If your charger is overcharging or undercharging cells, it may need calibration rather than a firmware flash: Calibration Menu: Htrc T240 Duo Firmware Update