The Foil Drive MAX Battery is the core spare-battery option for riders running the Foil Drive Assist MAX platform. If you want to stay out longer, keep a second battery ready for back-to-back sessions, or fine-tune the balance between runtime and weight, this is one of the most important upgrades in the MAX ecosystem.In the Foil Drive battery line-up, this product covers the standard MAX Sport and MAX Power choices. The Sport is the lighter, lower-capacity option, while the Power is the bigger step up for riders who want more time on foil and less compromise around stronger assistance.Why choose this product 40V battery option for the Foil Drive Assist MAX platform. Choose between MAX Sport and MAX Power depending on how much runtime and support you want. A good fit for riders building a spare-battery quiver around the Assist MAX. Supplied with protective storage items for transport and day-to-day ownership. Specifications System compatibility Foil Drive Assist MAX only Versions available MAX Sport / MAX Power Operating voltage 40V MAX Power quoted energy 498.69Wh MAX Power battery weight 2.6kg Installed weight (MAX Power) 4.5kg Installed dimensions (MAX Power) L525 x W125 x H50mm Battery-only dimensions (MAX Power) L420 x W75 x H40mm What's included Foil Drive MAX battery in your chosen version Lipo bag Power plug dust cap Helpful links Compare complete systems in our Foil Drive kits collection. See other power options in our batteries collection. Need the top-end option? View the Foil Drive MAX High Power Battery. Which MAX battery should I choose?Choose MAX Sport if you want a lighter, more affordable spare battery. Choose MAX Power if runtime matters more and you want stronger overall session flexibility.Is this battery compatible with the Assist Slim?No. The MAX battery platform is designed specifically for the Foil Drive Assist MAX. If you run a Slim system, look at the Slim Performance Battery or Slim Travel Battery.