Use a USB-C cable to connect the charger's "PC Link" port to your Windows PC.
Reboot the charger and confirm the new version number on the boot screen. Method 2: Update via SD Card
Launch the update tool, select the downloaded firmware file, and click "Update." Htrc T240 Duo Firmware Update
Ensure your Windows PC has .NET Framework 3.5 (including 2.0 and 3.0) enabled via the Windows Control Panel .
Newer versions (like v2.3.0) can improve balance accuracy by up to 76% , ensuring even cell wear and longer battery life. Use a USB-C cable to connect the charger's
Double-check the official HTRC download portal as links can occasionally be moved during site maintenance.
If your screen becomes unresponsive after or during use, it may be a physical ribbon cable issue rather than firmware. Reseating the internal ribbon cable often fixes dead zones on the left side of the screen. Newer versions (like v2
This method uses a Windows computer and the official HTRC Update Tool .
Insert the card, then hold the POWER button for seven seconds until the screen flashes.