This article explains how to prevent water ingress, what to do if water enters your Electronics Box, and how to correctly use dielectric grease to protect your electrical connectors from corrosion.

Water Entered My Electronics Box

If water enters the battery compartment, don't panic.

The Gen2 and Gen2.5 electronics are fully sealed.

The only components that require attention are the electrical connectors and the battery.

If Salt Water Entered the Unit

1. Remove the battery.
2. Drain all water from the unit.
3. Rinse the battery compartment thoroughly with fresh water to remove salt residue.
4. Allow the unit to drain and dry.
5. Dry the battery connector.
6. If the battery terminal is free of corrosion, reapply dielectric grease to the battery terminals.
7. Reinstall the battery once dry.

Removing salt is the most important step, as salt accelerates corrosion.

Important: If there is damage to the battery heat shrink or outer shell - do not use the battery or attempt to charge it. Reach out to [email protected] with clear, detailed photos so we can assess the battery. 

If Fresh Water Entered the Unit

Fresh water is much less of a concern.

Simply:

• Drain the water.
• Dry the compartment.
• Reapply dielectric grease to the connectors.
• Reinstall the battery.

Preventing Water Ingress

If you're regularly finding water inside the unit, there are several things to check:

• Ensure the O-ring is correctly installed.
• Check that the O-ring is clean and free from sand, dirt or debris.
• Check that the battery latches are correctly fitted and in good condition.
• Check for damage to the unit or sealing surfaces.
• Check that your board is sufficiently rigid for the Foil Drive installation.

Board Flex

Some boards may flex significantly under load.

If the board is too flexible, the movement of the board can place additional forces on the more rigid Foil Drive unit. During impacts or landings, this movement can momentarily affect the seal and allow water to enter the battery compartment.

If you're experiencing repeated water ingress, check the rigidity and compatibility of your board and Foil Drive setup.

Water Ingress with AXIS Pocket Trench

If you regularly find water inside the Electronics Box when using an AXIS Pocket Trench, first check that:

• There is no damage to the Electronics Box or sealing surfaces.
• The AXIS mounting hardware and sliders are installed correctly.
• The Pocket Trench is free from sand, gravel and other debris that could prevent the Foil Drive from sitting correctly.
• The board and Foil Drive are being installed in accordance with the AXIS Pocket Trench installation instructions.

Using Dielectric Grease

Dielectric grease helps protect electrical connectors from moisture and corrosion.

Apply a small amount of Foil Drive dielectric grease around the plug on the battery.

Do not apply excessive amounts of grease. Too much grease can interfere with the electrical connection and affect power delivery.

Need More Help?

If you've worked through these troubleshooting steps and are still experiencing battery issues, please contact the Foil Drive Support Team.