Fenix E01 V2 Troubleshooting StepsUpdated 2 hours ago

Confirm that your batteries are good. Try using the battery in another device. Confirm that the battery is inserted into the light facing the correct direction. The Positive (+) side should be toward the head (LED) of the flashlight. Confirm that there is only one o-ring on the light. The o-ring that comes in the box is a spare. The light already has an o-ring on it when you first remove it from the box. Lubricate the o-ring using a small amount of petroleum jelly on the end of a cotton swab. Make sure to screw the head down tightly. The E01 uses twist-head activation. The head must be fully tightened for the light to activate. After you have completed the above troubleshooting steps, if your light is still not working, visit our Warranty and Repair page (https://fenix-store.com/pages/warranty-info) to review the policy and submit a claim.