Troubleshooting

Test if the light is in the lockout mode: when you click the button it only shows the red indicator light on, which means the light is in the lockout mode. Please press and hold the button for about 3 seconds to get the product out of the lockout mode.
Test the MCC: please connect the charger to a metal object to see if it turns red. If it is still green, then it seems your MCC is defective.
Test the battery: please check if the light can be turned on while connected to the charger. If so, then the battery may get faulty.
Test the barrel or tail switch: please ensure the barrel or tail cap is fully tightened, and the charging contact surface is clean.

If your light issue was caused by a defective battery or charging cable, you could purchase a new one on our website or contact our customer service for a new replacement if it's within the warranty period.

If you have tried all these methods that still don't work, please submit the warranty form, and our customer service team will take care of you.