2026 Duotone ePart eHarness Battery Box

Duotone eHarness Battery Box is the waterproof housing that holds your Foil Assist batteries and the Bluetooth receiver that keeps your eRemote connected to the motor. Built from durable hard plastic, it's engineered to stay sealed under real riding conditions — a sliding lock combined with a sealing ring keeps the box shut and watertight, while a Gore-Tex valve on the back vents pressure without letting water in.

The receiver lives right in the lid, which keeps the Bluetooth connection between your remote and motor stable and reliable throughout a session — no dropped signal mid-ride. The box mounts to your eHarness with four screws, so it's a straightforward swap if yours cracks, floods, or otherwise needs replacing.

Grab this if your eHarness is still in good shape but the battery box itself needs to be replaced.