Description
Project Lithium — Foil Drive Assist MAX High Power Battery (Aftermarket)
The highest-capacity aftermarket repack available for the Foil Drive Assist MAX. Project Lithium’s High Power Battery is hand-assembled in Auckland, New Zealand using matched, Molicel P45B 4,500 mAh lithium-ion cells with integrated BMS charging protection — delivering the full 594 Wh in the same compact form factor as the OEM unit.
Whether you’re chasing longer downwind runs, extended surf sessions, or simply want fewer trips back to the charger, this is the battery to fit.
⚠️ Important: This battery is NOT water resistant. Use with a lipo bag at all times. Keep away from water ingress.
Tech Specs
- Battery Type: Lithium-Ion — compatible with Foil Drive Assist MAX only
- Rated Capacity: 594 Wh / 15 Ah
- Nominal Voltage: 39.6 V
- Max Voltage: 46.2 V
- Dimensions (bare): 420 × 75 × 40 mm
- Water Resistance: None — not sealed or IP-rated
- BMS Protection: Over-charge
- Charger Compatibility: Foil Drive 40V Charger / 40V Fast Charger
- Assembled: Auckland, New Zealand by Project Lithium Limited
What’s Included
- 1× Project Lithium Assist MAX High Power Battery (594 Wh)
- 1× Dust cap
Lipo bag strongly recommended — available separately.
This is an aftermarket product. Project Lithium Limited is not affiliated with Foil Drive Pty Ltd. “Foil Drive” and “Assist MAX” are trademarks of Foil Drive Pty Ltd.




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