Foil Drive Fusion Battery w/ Caddy

The Foil Drive Fusion Battery w/ Caddy is a standalone battery and management accessory for the Foil Drive Fusion electric foil-assist system. Produced by Australian brand Foil Drive, the Fusion platform sits as a distinct architecture alongside the earlier Gen 2 lineup—often referred to as Gen 2.5—operating on a dedicated 43 V electrical system rather than the lower voltage used by previous MAX and Slim batteries. The Fusion 860 battery is designed to pair exclusively with Fusion-series electronics and motor units, delivering longer sessions and higher thrust output than Foil Drive's earlier power packs.

This product bundles the Fusion 860 battery cell with Foil Drive's purpose-built Battery Caddy, a docking cradle that serves as both a protective transport housing and a smart battery-management station. The caddy communicates directly with the battery's Bluetooth-enabled BMS, displaying accurate state-of-charge readings and estimated charge times on its built-in screen. It also doubles as a portable power bank via integrated USB-A and USB-C ports rated up to 65 W, and includes a heatsink-based discharge function that can bring the cell down to a recommended storage voltage—an important feature for extending lithium-ion cycle life between sessions.

• Capacity: 864 Wh
• Amp Hours: 20 Ah
• Nominal Voltage: 43.2 V
• Max Voltage: 50.4 V
• Battery Weight: 4.9 kg (10.8 lb)
• Dimensions: 658 × 125 × 54 mm
• Water Rating: IP69
• Charge Time: Approximately 1 hr 45 min (with 43 V / 12 A charger, sold separately or included with full Fusion kits)
• Caddy Ports: USB-A and USB-C (65 W max)
• Package Contents: Fusion 860 Battery, Battery Caddy, Fusion Battery Terminal Cap, Fusion 860 Battery Carry Case

The Fusion 860 battery targets riders who need extended time on the water without swapping cells. With roughly double the runtime of Foil Drive's earlier MAX battery, it suits heavier riders, those paddling out to distant lineups, and anyone who wants sustained power over sessions lasting one to three hours depending on conditions and throttle use. The 43 V platform also delivers approximately 40 percent more thrust than the MAX Power setup, making it relevant for riders in larger surf or choppier conditions where extra drive through turbulent water matters.

The caddy component adds value for riders who travel frequently or store gear between swells. Its storage-discharge mode removes the need for manual voltage management, while the USB charging ports make it a practical power bank on boat trips or remote beach sessions. Gen 2 owners can also use the caddy to discharge their existing MAX, MAX HP, or Travel batteries, though it will not charge them.

Within Foil Drive's catalog, the Fusion 860 Battery w/ Caddy is sold as a spare or secondary battery for riders who already own a complete Fusion Base Kit or Full Kit. The full kits ship with one 860 battery and caddy alongside the motor, controller, charger, and mounting hardware, so this listing is primarily an add-on for those wanting a backup cell or replacing an aging unit. Foil Drive does not currently offer a larger or smaller Fusion battery option—the 860 is the sole capacity in the Fusion line.

Compared to Foil Drive's Gen 2 battery ecosystem—which includes the MAX (roughly 440 Wh), MAX HP, Slim, and Travel cells—the Fusion 860 occupies a higher-capacity, higher-voltage tier that is not cross-compatible with Gen 2 electronics. Riders weighing a move from Gen 2 to Fusion should note that the transition requires adopting the full Fusion drivetrain, not just the battery. In the broader electric foil-assist market, the Fusion 860 competes on energy density with packs from Fliteboard's Flite Jet system and Takuma's Efoil Cruising battery, though each operates within its own closed ecosystem.