Last updated: October 2026
These terms apply to every purchase from Posterduck Customs LLC (“Posterduck Customs”, “we”), a Minnesota limited liability company based in Lakeville, Minnesota, USA, through posterduckcustoms.com. By placing an order you agree to them. Questions? Email charlie@posterduckcustoms.com.
Our products
We make custom eFoil accessories and parts, including battery enclosures, battery kits and parts for building or repairing batteries. Many items are made to order. Our products are designed to fit eFoil boards made by other companies. Brand and model names are used only to describe compatibility. Posterduck Customs LLC is not affiliated with or endorsed by those manufacturers, and their trademarks belong to their owners.
Photos and descriptions are as accurate as we can make them. Because many items are handmade, small differences in finish or color are normal and are not defects.
Invite only products
Some products are offered only to invited customers through a private link or account. Please do not share those links or access details.
Prices and payment
Prices are in US dollars and do not include shipping or applicable sales tax, which are shown at checkout. If a price or description on the site is wrong, we may contact you to correct it or cancel the order with a full refund.
Orders and changes
Because items are made to order, please check your order carefully before paying. If you need to change something, email us as soon as possible. Once work on an item has started, the order cannot be cancelled.
Shipping
We currently ship within the United States only. See our Shipping Policy for details. If you are outside the US, email charlie@posterduckcustoms.com and we will see what we can do.
No returns, and our warranty
All sales are final. We do not accept returns or exchanges. Your purchase is covered by our limited warranty, explained on our Returns, Refunds and Warranty page. Modifying a product, or using it for something other than its intended purpose, voids the warranty. If an item sent to us for a warranty claim is damaged or unsafe to handle or ship, we may dispose of it safely instead of returning it.
Installation and safety
eFoiling carries real risk. Install parts according to your board manufacturer’s instructions, or have a qualified technician do it. You are responsible for installing and using products safely and checking that a part suits your board. Fitting aftermarket or replacement parts may affect a manufacturer’s warranty on your board.
Lithium-ion batteries and DIY builds
Some of our products, including the Helium Enclosure, the Helium Kit and our bus bars, are used to build or repair lithium-ion batteries. These batteries store a large amount of energy. Building, modifying, charging, storing, transporting or using one incorrectly can cause fire, explosion, serious injury, death or damage to property.
You must be 18 or older to buy these products. They are only for people who have experience building lithium-ion batteries, or who have a qualified technician do the work. If you buy one, you are responsible for:
- The design, assembly and testing of your battery
- Choosing cells, a BMS, wiring and connectors that suit your build, including handling at least 120 amps
- Programming and checking the BMS
- Sealing the enclosure. Our enclosures are water resistant, not waterproof
- Charging, storing, transporting and disposing of your battery safely and as the law requires
Capacity, current and other ratings for cells, BMS units and other components come from their manufacturers. We pass them on as published and do not certify them. You are responsible for checking that every part suits your build.
Read our Battery Safety page for charging, storage and warning signs.
We do not inspect, test or certify batteries built or repaired with our products. We do not promise that a battery you build will be safe, will perform a certain way, or will work with any board or firmware. Board makers can change their firmware at any time.
By buying these products, you understand and accept the risks of building, repairing and using a lithium-ion battery. To the extent the law allows, you agree to cover Posterduck Customs LLC for any claims, losses, damages and costs, including reasonable legal fees, that come from how you build, modify, install, charge, store or use a battery or board with our products.
Limitation of liability
To the fullest extent the law allows, Posterduck Customs LLC is not liable for indirect or consequential losses, including damage to boards, batteries or other property, or loss of use, that comes from building, modifying, installing or using our products. Our total liability for any order is limited to the amount you paid for it. Nothing in these terms limits rights you have under law that cannot be waived.
Governing law
These terms are governed by the laws of the State of Minnesota, USA.
Changes
We may update these terms. The version on this page when you place your order applies to that order.