{"product_id":"foil-drive-fm-battery-adaptor","title":"Foil Drive FM+ Battery Adaptor for Fusion","description":"\u003csection class=\"supco-product-intro\"\u003e \u003cp\u003e\u003cstrong\u003eThe Foil Drive FM+ Battery Adaptor is the dedicated adaptor that allows an FM+ battery, including the 648Wh FM+ 650, to fit securely inside a Foil Drive Fusion.\u003c\/strong\u003e It extends the shorter FM+ battery to match the longer battery space of the Fusion unit, creating a secure, tool-free installation without changing the core Fusion system.\u003c\/p\u003e \u003cp\u003eThis is the small component that gives Fusion owners much more flexibility over battery choice. Fit the larger Fusion 860 when maximum runtime is the priority, or use the FM+ Battery Adaptor with an FM+ 650 when you want to reduce battery weight and give the board a lighter, more responsive feel.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e the adaptor is only required when fitting an FM+ battery to a \u003cstrong\u003eFoil Drive Fusion\u003c\/strong\u003e. It is \u003cstrong\u003enot required with the Foil Drive Assist MAX+\u003c\/strong\u003e, because FM+ batteries fit MAX+ directly.\u003c\/p\u003e \u003cp\u003eIf you are building or upgrading a complete powered foil setup, browse our \u003ca href=\"\/collections\/foil-drive\"\u003eFoil Drive range\u003c\/a\u003e or \u003ca href=\"\/collections\/foil-assist\"\u003ecomplete foil assist systems\u003c\/a\u003e.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-purpose\"\u003e \u003ch2\u003eWhat does the Foil Drive FM+ Battery Adaptor do?\u003c\/h2\u003e \u003cp\u003eThe Foil Drive Fusion was designed around a longer battery format. The newer FM+ batteries are shorter, so they cannot simply be placed into the Fusion battery space without the correct support.\u003c\/p\u003e \u003cp\u003eThe FM+ Battery Adaptor effectively extends the FM+ battery so that it occupies the correct length inside the Fusion. This gives the battery a secure, properly located interface with the Fusion rather than allowing a shorter battery to move within a space designed around the larger Fusion battery.\u003c\/p\u003e \u003cp\u003eIntegrated \u003cstrong\u003eQuick Lock Tabs\u003c\/strong\u003e provide a tool-free connection, so changing between battery configurations does not require bolts, separate installation hardware or permanent modifications.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-why-choose\"\u003e \u003ch2\u003eWhy use an FM+ battery with Foil Drive Fusion?\u003c\/h2\u003e \u003cp\u003eThe main reason is not simply compatibility. It is the ability to change the character of your Fusion depending on the session.\u003c\/p\u003e \u003cp\u003eThe standard \u003cstrong\u003eFusion 860\u003c\/strong\u003e battery prioritises maximum capacity and runtime. The \u003cstrong\u003eFM+ 650\u003c\/strong\u003e has less capacity, but it is also physically shorter and lighter.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eBattery\u003c\/th\u003e \u003cth\u003eFM+ 650\u003c\/th\u003e \u003cth\u003eFusion 860\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eCapacity\u003c\/td\u003e \u003ctd\u003e648Wh\u003c\/td\u003e \u003ctd\u003e864Wh\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eNominal voltage\u003c\/td\u003e \u003ctd\u003e43.2V\u003c\/td\u003e \u003ctd\u003e43.2V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBattery weight\u003c\/td\u003e \u003ctd\u003eApprox. 3.95kg\u003c\/td\u003e \u003ctd\u003eApprox. 4.9kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBattery length\u003c\/td\u003e \u003ctd\u003e460mm\u003c\/td\u003e \u003ctd\u003e575mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMain advantage\u003c\/td\u003e \u003ctd\u003eLower weight and more responsive setup\u003c\/td\u003e \u003ctd\u003eMaximum Fusion runtime\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003eThe FM+ 650 battery itself is approximately \u003cstrong\u003e0.95kg lighter\u003c\/strong\u003e than the Fusion 860. The adaptor adds approximately 100g, so the FM+ route still provides a meaningful reduction in battery-system weight while retaining 648Wh of capacity.\u003c\/p\u003e \u003cp\u003eFor surf foiling, downwind, wing foiling and other sessions where the motor is primarily assisting take-off and positioning rather than powering the board continuously, that can be a very useful trade.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-who-needs\"\u003e \u003ch2\u003eDo I need the Foil Drive FM+ Battery Adaptor?\u003c\/h2\u003e \u003cp\u003eYou need this adaptor if:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eyou own a \u003cstrong\u003eFoil Drive Fusion\u003c\/strong\u003e;\u003c\/li\u003e \u003cli\u003eyou want to run an \u003cstrong\u003eFM+ series battery\u003c\/strong\u003e in that Fusion; and\u003c\/li\u003e \u003cli\u003eyour Fusion does not already have an FM+ Battery Adaptor supplied with it.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThis is particularly relevant to riders who purchased a Fusion \u003cstrong\u003ebefore the FM+ battery range was introduced in September 2026\u003c\/strong\u003e. Earlier Fusion packages were not supplied with this adaptor because the FM+ battery range had not yet been released.\u003c\/p\u003e \u003cp\u003eCurrent-generation Fusion packages supplied following the launch of the FM+ batteries include the FM+ Battery Adaptor as part of the complete kit, so \u003cstrong\u003echeck what you already have before ordering another one\u003c\/strong\u003e.\u003c\/p\u003e \u003cp\u003eIf you are unsure, send The SUP Company a photograph of your Fusion system and the components supplied with it and we can help confirm what you need.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-not-needed\"\u003e \u003ch2\u003eWhen do you NOT need this adaptor?\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003eYou do not need an FM+ Battery Adaptor to use the FM+ 650 with the Foil Drive Assist MAX+.\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThe MAX+ was designed specifically around the newer FM+ battery architecture, so the FM+ 650 fits directly into the MAX+ system.\u003c\/p\u003e \u003cp\u003eThe adaptor should therefore not be viewed as a general Foil Drive battery accessory. Its purpose is very specific: \u003cstrong\u003eadapting the shorter FM+ battery format to the longer Foil Drive Fusion battery installation.\u003c\/strong\u003e\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-installation\"\u003e \u003ch2\u003eTool-free Quick Lock installation\u003c\/h2\u003e \u003cp\u003eThe adaptor uses integrated \u003cstrong\u003eQuick Lock Tabs\u003c\/strong\u003e to create a secure extension between the FM+ battery and the Fusion.\u003c\/p\u003e \u003cp\u003eNo separate installation bolts or tools are required for the adaptor itself. It connects to the FM+ battery so the combined assembly can be installed into the Fusion in the correct configuration.\u003c\/p\u003e \u003cp\u003eThis makes it practical to maintain more than one Fusion battery setup. You might use the Fusion 860 for long sessions or sustained powered riding, then switch to the FM+ 650 and adaptor when lower weight is more important.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-benefits\"\u003e \u003ch2\u003eWhy the adaptor is useful for Fusion riders\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRun FM+ batteries in Fusion:\u003c\/strong\u003e converts the shorter FM+ battery format for use in the longer Fusion unit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTool-free fitting:\u003c\/strong\u003e Quick Lock Tabs remove the need for separate installation hardware.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOnly around 100g:\u003c\/strong\u003e adds very little weight to the lighter FM+ battery configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChange the feel of your Fusion:\u003c\/strong\u003e move between maximum-runtime and lower-weight battery configurations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNo permanent conversion:\u003c\/strong\u003e retain the ability to use the larger Fusion battery when required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesigned specifically for Foil Drive:\u003c\/strong\u003e provides the correct interface rather than using improvised packing or spacers.\u003c\/li\u003e \u003c\/ul\u003e \u003c\/section\u003e \u003csection class=\"supco-fusion-use\"\u003e \u003ch2\u003eFM+ 650 + Fusion: who does this setup suit?\u003c\/h2\u003e \u003cp\u003eRunning an \u003cstrong\u003eFM+ 650 in a Fusion\u003c\/strong\u003e is particularly interesting for riders who like the capabilities of Fusion but do not need the 864Wh Fusion 860 battery for every session.\u003c\/p\u003e \u003ch3\u003eSurf foiling\u003c\/h3\u003e \u003cp\u003eIf the motor is mainly being used to motor out, reposition, catch waves and recover from falls, carrying the largest available battery is not always necessary. The FM+ 650 gives you 648Wh while reducing the weight underneath the board.\u003c\/p\u003e \u003ch3\u003eDownwind foiling\u003c\/h3\u003e \u003cp\u003eFor riders using Foil Drive to achieve the first take-off, recover after touchdowns or motor back into position, reducing system weight can improve the feel of the board once the foil is flying freely.\u003c\/p\u003e \u003ch3\u003eWing foiling\u003c\/h3\u003e \u003cp\u003eIf Fusion is helping with light-wind starts and occasional recovery rather than providing continuous thrust, the FM+ 650 provides a useful middle ground between capacity and installed weight.\u003c\/p\u003e \u003ch3\u003eFlat-water and pump training\u003c\/h3\u003e \u003cp\u003eThe 648Wh FM+ 650 still gives substantial capacity for repeated powered starts while keeping the overall package lighter than the Fusion 860 setup.\u003c\/p\u003e \u003ch3\u003eLong-range or sustained powered riding\u003c\/h3\u003e \u003cp\u003eIf maximum runtime is the priority, keep the Fusion 860. The value of this adaptor is that you do not have to choose one battery philosophy permanently: Fusion can be configured differently for different sessions.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-compatibility\"\u003e \u003ch2\u003eFoil Drive FM+ Battery Adaptor compatibility\u003c\/h2\u003e \u003ch3\u003eCompatible with\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eFoil Drive Fusion\u003c\/li\u003e \u003cli\u003eFoil Drive FM+ battery range\u003c\/li\u003e \u003cli\u003eFoil Drive FM+ 650 Battery\u003c\/li\u003e \u003cli\u003eGen 2.5 43V Foil Drive Fusion battery architecture\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eNot required with\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eFoil Drive Assist MAX+\u003c\/li\u003e \u003cli\u003eFusion 860 Battery when fitted to Fusion in its standard configuration\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eNot compatible as an upgrade for\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eFoil Drive Assist MAX Gen 2\u003c\/li\u003e \u003cli\u003eolder 40V Gen 2 MAX battery systems\u003c\/li\u003e \u003cli\u003eGen 1 Assist or Assist Plus systems\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eIf you need the battery as well, browse our \u003ca href=\"\/collections\/batteries\"\u003eFoil Drive and electric watersports batteries\u003c\/a\u003e. For pods, controllers, motor cables, propellers and other system components, see our \u003ca href=\"\/collections\/foil-assist-accessories\"\u003efoil assist accessories\u003c\/a\u003e.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-specifications\"\u003e \u003ch2\u003eFoil Drive FM+ Battery Adaptor specifications\u003c\/h2\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003eProduct\u003c\/th\u003e \u003ctd\u003eFoil Drive FM+ Battery Adaptor\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eFoil Drive SKU\u003c\/th\u003e \u003ctd\u003eFD330\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePurpose\u003c\/th\u003e \u003ctd\u003eAllows FM+ batteries to fit securely within a Foil Drive Fusion\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eSystem compatibility\u003c\/th\u003e \u003ctd\u003eFoil Drive Fusion\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eBattery compatibility\u003c\/th\u003e \u003ctd\u003eFoil Drive FM+ battery range, including FM+ 650\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eInstallation\u003c\/th\u003e \u003ctd\u003eTool-free Quick Lock connection\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eProduct weight\u003c\/th\u003e \u003ctd\u003eApprox. 100g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eSize\u003c\/th\u003e \u003ctd\u003eOne size\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eAdditional installation hardware required\u003c\/th\u003e \u003ctd\u003eNo\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/section\u003e \u003csection class=\"supco-package\"\u003e \u003ch2\u003eWhat's included?\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e1 x Foil Drive FM+ Battery Adaptor\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eBattery, Fusion unit, charger and other Foil Drive components are not included.\u003c\/strong\u003e\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-buying-advice\"\u003e \u003ch2\u003eOur advice before ordering\u003c\/h2\u003e \u003cp\u003eThis is a straightforward part once you know which Foil Drive generation you own, but it is easy to order unnecessarily if you do not check your existing Fusion package first.\u003c\/p\u003e \u003cp\u003eIf your Fusion was supplied after the introduction of the FM+ batteries in September 2026, check your accessories before buying because the adaptor may already have been included with your complete system.\u003c\/p\u003e \u003cp\u003eIf you own an earlier Fusion and are adding an FM+ 650, you will need the adaptor to create the correct physical fit between the shorter battery and the Fusion.\u003c\/p\u003e \u003cp\u003eIf you own \u003cstrong\u003eMAX+\u003c\/strong\u003e, do not add this adaptor simply because you are buying an FM+ 650. MAX+ accepts the FM+ battery directly.\u003c\/p\u003e \u003cp\u003eFor the complete higher-capacity system, see the \u003ca href=\"\/products\/foil-drive-fusion-complete-kit-3-blade-propeller\"\u003eFoil Drive Fusion Complete Kit\u003c\/a\u003e, or browse all \u003ca href=\"\/collections\/foil-drive\"\u003eFoil Drive products at The SUP Company\u003c\/a\u003e.\u003c\/p\u003e \u003c\/section\u003e \u003csection class=\"supco-faq\"\u003e \u003ch2\u003eFoil Drive FM+ Battery Adaptor FAQs\u003c\/h2\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eWhat does the Foil Drive FM+ Battery Adaptor do?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eIt extends the shorter FM+ battery format so that an FM+ battery can fit securely within the longer battery space of the Foil Drive Fusion.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eDo I need the adaptor with an FM+ 650 and Fusion?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eYes. An FM+ 650 requires the FM+ Battery Adaptor when installed in a Foil Drive Fusion.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eDo I need the adaptor with an FM+ 650 and MAX+?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eNo. The Foil Drive Assist MAX+ accepts the FM+ battery directly. The adaptor is specifically for using the shorter FM+ battery format with Fusion.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eDoes my new Foil Drive Fusion already include the adaptor?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eFusion systems supplied following the September 2026 introduction of the FM+ batteries include the FM+ Battery Adaptor as part of the complete package. If you already own a current Fusion kit, check the supplied components before ordering another adaptor.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eI bought my Fusion before September 2026. Do I need one?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eIf you now want to use an FM+ battery, yes. Earlier Fusion systems pre-date the FM+ battery release and therefore were not originally supplied with the adaptor.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eDoes the adaptor need tools to install?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eNo. It uses Foil Drive's integrated Quick Lock Tabs to provide a tool-free connection between the FM+ battery configuration and the Fusion.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eHow much does the FM+ Battery Adaptor weigh?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eApproximately 100g.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eWhy would I use an FM+ 650 instead of the Fusion 860?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eThe FM+ 650 sacrifices some maximum capacity in return for lower battery weight and shorter dimensions. With the adaptor fitted, it gives Fusion riders a lighter configuration for sessions where board response and lower installed weight matter more than achieving the longest possible runtime.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eHow much lighter is the FM+ 650 setup?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eThe FM+ 650 battery weighs approximately 3.95kg compared with approximately 4.9kg for the Fusion 860. The adaptor itself adds around 100g, so there remains a useful overall weight saving at battery level.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eCan I swap between the FM+ 650 and Fusion 860?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eYes. That flexibility is one of the main reasons the adaptor exists. You can configure Fusion around the larger battery when maximum runtime matters, then use an FM+ battery and adaptor for a lighter setup.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eIs the adaptor compatible with the older Gen 2 Assist MAX?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eNo. The FM+ battery system belongs to Foil Drive's newer Gen 2.5 43V architecture. This adaptor does not convert an older Gen 2 MAX to use FM+ batteries.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eDoes the FM+ Battery Adaptor include a battery?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eNo. This product is the adaptor only. The compatible FM+ battery, Foil Drive Fusion and charger are sold separately unless specifically included as part of another package.\u003c\/p\u003e \u003c\/details\u003e \u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eCan The SUP Company check whether I need one?\u003c\/strong\u003e\u003c\/summary\u003e \u003cp\u003eYes. If you are unsure when your Fusion was supplied or exactly which components you already have, send us a photograph of the system and battery area and we can help confirm the correct configuration before you order.\u003c\/p\u003e \u003c\/details\u003e \u003c\/section\u003e","brand":"Foil Drive","offers":[{"title":"Default Title","offer_id":54707657703757,"sku":"FD330","price":99.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0904\/8381\/8829\/files\/Foil-Drive-FM_-Battery-Adaptor.jpg?v=1790107077","url":"https:\/\/www.thesupco.com\/products\/foil-drive-fm-battery-adaptor","provider":"The SUP Company","version":"1.0","type":"link"}