GearLight S400 Rechargeable LED Bike Light Set Support & Troubleshooting

Operation Guide


  • If the light does not turn on or works intermittently:

    • Make sure the power button is not stuck.

    • Recharge the light only if no damage is observed.

  • If the light does not charge:

      • Check the USB charging cable connection and the power source.

        Note: A computer in sleep mode will not charge the light.

    • If the problem persists, replace the USB charging cable.


    • When the lights are not in use, store them with a moderate level of charge and in a cool place away from flammable materials.  Once every few months, discharge the batteries fully and recharge.

      How-To Video

      • Coming soon!