The device has over & under voltage and charging temperature protection. Ensure you are using the USB-C cable provided and have connected to a safety extra-low voltage (SELV) circuit rated at 5VDC, 2.0A. Charge your device between 15 – 25 ⁰C, if the device detects it is too hot or cold during charging the device will display an error code and charging will stop. If charging with a wireless charging pad, ensure the charger is QI certified. If the problem persists, please contact the Vuse Care Team.