Fenix WT20R Troubleshooting StepsUpdated a day ago

Confirm that the battery or batteries are working properly by testing them in another compatible device.

Make sure the battery or batteries are inserted into the light in the correct direction, as indicated inside the battery compartment.

Confirm that there is only one O-ring on the light. The light already has an O-ring installed when it is removed from the box. The additional O-ring included in the box is a spare. If you installed the spare O-ring, please remove it, as having two O-rings will prevent the light from making a full connection with the batteries.

Lubricate the O-ring by applying a small amount of petroleum jelly with the end of a cotton swab.

Press and hold the power switch for 0.5 seconds. A single press will not turn on the light. You must hold the button until the light activates.

Confirm that the battery compartment is fully and tightly sealed.

If the light is still not working after you have completed these troubleshooting steps, please visit our Warranty and Repair page to review the policy and submit a claim.