Fenix HT18 Troubleshooting StepsUpdated 2 years ago

• Confirm that your batteries are good. Try using the battery in another device.
• Confirm that the battery/batteries are 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. If you put on the spare o-ring, please remove it as this will prevent the light from making a full connection with the batteries.
• Lubricate the o-ring using a small amount of petroleum jelly on the end of a cotton swab.
• If you are having trouble getting the filters on, try putting the filter flat on a table with the gripping "teeth" up and press the flashlight down onto the filter. This is easier than trying to press the filter on to the light while holding it.
• Perform troubleshooting as suggested on our general "Troubleshooting Your Flashlight" page.

After you have completed the above troubleshooting steps, if your light is still not working, please click one of the two links below:

• If you purchased this product directly through Fenix-Store.com, please click here to submit a return. You can find your order number on your account page.
• If you purchased this product direct through Fenix-Store.com over a year ago, please click here to fill out or Return Authorization form.
• If you purchased this product from another store or a different Fenix distributor, please click here to fill out our Return Authorization form.