Please note the TX16s has 2 USB-C ports. The Port at the top is for data and simulator use only and is not used for charging your radio. The USB-C port at the bottom of your radio is for charging only. Please connect the supplied cable to the bottom port and use a stable USB power supply rated at 1.5amps to 2.0amps for best results. The TX16s has a built in battery management system that balances the 2 cell battery you install and limits current to 1.5amps while charging for safety.