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Open the HTRC firmware update application on your PC. The software should automatically detect the assigned COM port.
: Use a high-quality USB-C cable to connect your charger to your PC.
Operating an RC charger on factory-v1 firmware is like running a smartphone on an outdated operating system. It works, but you miss out on critical optimizations. Updating to the latest firmware delivers immediate benefits. 1. Better Voltage Accuracy and Calibration htrc t240 duo firmware update better new
The T240 Duo features a USB-C PC Link port located on the device. Connect one end of your USB cable to the charger and the other end to an available USB port on your computer.
HTRC T240 Duo is marketed with firmware upgrade support, it is critical to note that as of late 2024 and early 2026, the manufacturer Shenzhen Haitan Technology (HTRC) has faced significant safety issues, including a recall of the similar C240 and T400 models due to fire hazards. Shenzhen Haitan Technology Co.,Ltd Firmware Update Reality Open the HTRC firmware update application on your PC
| Feature | Older Firmware (V1.0–V1.12) | Newer Firmware (V2.10+) | Benefit | |---------|----------------------------|--------------------------|---------| | | Incorrect 4.20V/cell cutoff | Correct 4.35V/cell cutoff | Prevents undercharging high-voltage packs. | | Internal resistance (IR) measurement | Inconsistent, drifts by 5–10mΩ | Stable, repeatable readings | Better pack health assessment. | | Balance current | Fixed 300mA per channel | Adaptive up to 500mA | Faster balancing for large packs (5000mAh+). | | NiMH delta-peak sensitivity | False peaks on old batteries | Adjustable range (3–10mV/cell) | Less premature charge termination. | | Storage mode voltage | 3.80V (LiPo) fixed | Configurable 3.70–3.85V | Suits different battery chemistries. | | Screen refresh rate | ~5 Hz (slightly laggy) | ~10 Hz (smoother) | Better real-time voltage tracking. | | Buzzer patterns | Single beep for errors | Distinct beep codes for overtemp / reverse polarity | Safer operation. |
The HTRC T240 Duo firmware update offers a "better new" solution to problems that have long plagued this device. While the charger always had the hardware to be a top-tier dual-channel workhorse, its software left safety and reliability in doubt. This update addresses the core glitches that caused overcharging, freezing, and erratic behavior. Operating an RC charger on factory-v1 firmware is
introduces several critical performance and safety features designed to improve battery longevity and charging reliability. Key New Features & Improvements
Unlock Better Performance: The Ultimate HTRC T240 Duo Firmware Update Guide
While the T240 is solid out of the box, firmware updates often bring refined algorithms.
This firmware is a worthwhile, incremental improvement—prioritizing reliability, battery/thermal behavior, and connectivity—recommended for most users who want a smoother, more dependable T240 Duo experience.