Htrc T240 Duo Firmware Update Better May 2026

Stay safe and happy charging!
Have you updated your T240 Duo? Share your experience below. 👇

HTRC T240 Duo theoretically supports firmware updates through its USB port, there is currently no official firmware update

available for download from the manufacturer. Users have reported that the official website often lacks these files, and the charger may not be recognized by computers even with recommended drivers.

More importantly, serious safety concerns have recently emerged regarding HTRC chargers: Safety Hazard & Recall

: HTRC has issued significant recalls for related models (like the C240) due to severe overheating and fire hazards Htrc T240 Duo Firmware Update BETTER

. The CPSC and other safety organizations have issued alerts warning that these chargers can ignite or cause batteries to catch fire. Manufacturer Unresponsiveness

: Regulatory bodies have noted that the manufacturer, Shenzhen Haitan Technology, has often been unresponsive to inquiries regarding these safety incidents. Operational Bugs

: Users often seek firmware updates to fix common issues like incorrect cell count detection or "Lower Cell Volt" errors, but without official software support, these bugs generally remain unresolved. Shenzhen Haitan Technology Co.,Ltd Recommendations

Due to the fire risks and lack of software support, experts and community members recommend the following: Stop Using Affected Models Stay safe and happy charging

: If you experience overheating, stop using the charger immediately. Check for Refunds : Visit the Official HTRC Recall Page or contact their support at servicesupport@ht-rc.com to see if your unit is eligible for a refund. Upgrade to Reliable Brands

: Consider switching to reputable brands known for consistent firmware support and safety, such as with similar dual-channel capabilities? HTRC 240 Dual Charger Recall Thoughts - Facebook

To prove the point, we ran a test on two identical HTRC T240 Duo units. One ran stock firmware (v1.8), and the other ran the latest update (v2.4).

The most common complaint about older HTRC T240 Duo firmware is aggressive balancing. Older versions often over-correct, causing the charger to bleed off voltage from high cells too quickly, generating excess heat and wasting energy. Newer firmware introduces "Smart Balancing" algorithms that passively balance during the charge cycle, resulting in: To prove the point, we ran a test

| Problem | Solution | |--------|----------| | COM port not found | Reinstall CP210x driver, try different USB port/cable | | Update fails at 50% | Bad USB cable (use a data sync cable), or power interruption | | Screen stays black after update | Re-enter DFU mode and re-flash. If no response, contact HTRC for recovery file | | Charger works but voltages off | Perform factory calibration (requires a known-good battery or multimeter) |

  • Download the .hex firmware file and the ST-Link Utility or DFU tool specified in the instructions.

    • Perhaps the most critical reason to update is safety. HTRC has patched rare edge cases where the charger could enter an undefined state (e.g., starting a discharge cycle without a load). The new firmware includes:

    Don’t update if everything works fine. HTRC rarely publishes changelogs. Only update if you have a specific bug (e.g., balance current stuck, incorrect LiHV cutoff).