Foil Drive FM+ 650 Battery

The Perfect Balance of Runtime, Weight and Performance

The FM+ 650 Battery is the go-to battery for the Foil Drive MAX+ and Fusion systems. With a 648 Wh capacity and Foil Drive’s 43.2 V Gen 2.5 architecture, it delivers powerful, consistent thrust and dependable runtime without adding unnecessary weight.

For MAX+ riders, the FM+ 650 provides the highest available battery capacity. For Fusion riders, it offers a lighter and more manoeuvrable alternative to the larger Fusion 860 Battery when used with the FM+ Battery Adaptor.

It is ideal for extended surf sessions, upwind and downwind runs, wake foiling, pumping practice, flatwater starts and light eFoiling.

Key Specifications

• Rated capacity: 648 Wh
• Battery capacity: 15 Ah
• Nominal voltage: 43.2 V
• Maximum voltage: 50.4 V
• Battery weight: 3.95 kg
• Battery dimensions: 460 × 125 × 55 mm
• Installed dimensions with MAX+: 540 × 125 × 55 mm
• Installed dimensions with Fusion: 658 × 125 × 55 mm
• Battery type: Lithium-ion
• Integrated nosecone
• Water and dust protection: IP68 and IP69 certified
• Average charging time: Approximately 85 minutes
• Storage Mode charging supported

Estimated Runtime

Surf foiling

• Intermediate rider: Approximately 40–50 minutes
• Advanced rider: Approximately 55–70 minutes

eFoiling

• Intermediate rider: Approximately 31 minutes
• Advanced rider: Approximately 52 minutes

Runtime figures are indicative only and will vary according to rider weight, skill level, board and foil size, motor usage, weather and riding conditions.

Advanced Battery Technology

The Gen 2.5 battery technology delivers full power down to approximately 10% battery charge before normal power reduction begins.

An intelligent Bluetooth Battery Management System provides accurate battery information to the V3 Controller and Foil Drive App, including:

• Battery charge level
• Battery health
• Battery identification and naming
• Accurate state-of-charge information

Internal thermal management helps maintain a stable operating temperature for smooth, consistent thrust throughout your session.

Durable One-Piece Design

The one-piece moulded construction combines the battery and nosecone into a single streamlined unit. This improves sealing, durability and water flow while keeping the battery’s weight balanced over the foil’s centre of lift.

Compatibility

The FM+ 650 Battery is compatible with:

• Foil Drive Assist MAX+
• Foil Drive Fusion when used with the FM+ Battery Adaptor
• Foil Drive FM+ Battery Adaptor
• Foil Drive 43 V Standard Charger
• Foil Drive Battery Caddy when used with the FM+ Battery Adaptor

Important: The FM+ 650 Battery is not compatible with the original Gen 2 MAX or other Gen 2 systems.

What’s Included

• Foil Drive FM+ 650 Battery
• Protective battery carry case

Battery Care

The FM+ 650 Battery must be charged using the 43 V charger supplied with the Foil Drive Fusion or MAX+. For storage, maintain the battery at approximately 30–60% charge and follow the instructions provided in the Foil Drive Battery and Charger user manuals.