| Issue | Likely Cause | Solution | |-------|--------------|----------| | PC doesn’t detect charger | Wrong USB cable (charge-only) | Use data-capable cable. | | Update fails at 50% | Power interruption or antivirus blocking | Disable AV temporarily, use stable power. | | Charger won’t turn on after update | Corrupted flash | Recover via bootloader: short two test points (contact HTRC support for exact pins). | | Erratic voltage readings | No factory reset after update | Perform “Restore Defaults” in menu. |
Warning: A failed update can brick the charger. Only proceed if the charger is otherwise functional and you have a reliable USB cable. htrc t240 duo firmware update better new
After testing the new firmware on a 2023 T240 DUO and a 2021 model, the difference is most noticeable for parallel charging and LiHV storage. | Issue | Likely Cause | Solution |
One drone racer reported: “Before the update, my T240 would always terminate storage charge about 0.02V per cell too low. After the update, six packs in parallel all hit exactly 3.85V. That’s an extra minute of flight time per pack after a month of storage.” Warning: A failed update can brick the charger
However, if you use your T240 DUO exclusively for NiMH receiver packs or basic 2S LiPo batteries, the update offers little tangible benefit.
Previously, if you charged a 4S on Channel A and a 2S on Channel B, the processor would prioritize one channel, leading to voltage drift. The updated firmware leverages a dual-core balancing algorithm.