{"product_id":"duotone-foil-assist-battery-7a-set-2pcs","title":"Duotone Foil Assist Battery 7A Set (2Pcs)","description":"\u003cp\u003eIf you already own a Duotone Foil Assist or Cruise setup, the \u003cstrong\u003eDuotone Battery 7A Set (2Pcs)\u003c\/strong\u003e is the battery pack that keeps you riding for longer and with less waiting around on the beach. This is a complete working set of two original Duotone 7Ah batteries, built specifically for the Foil Assist ecosystem and designed to deliver reliable, consistent power in a compact, travel-friendly format.\u003c\/p\u003e\n\u003cp\u003eFor most riders, this product makes the most sense as a \u003cstrong\u003espare or replacement battery set\u003c\/strong\u003e. It is not the part you buy to “start” a Foil Assist setup from scratch. Instead, it is the upgrade that makes an existing setup more usable in the real world, whether that means back-to-back sessions, sharing one system between riders, or simply avoiding the frustration of sitting around while your only set recharges.\u003c\/p\u003e\n\u003ch3\u003eWhere This Sits in the Range\u003c\/h3\u003e\n\u003cp\u003eThis battery set sits firmly in the \u003cstrong\u003espares and upgrade\u003c\/strong\u003e side of the Duotone Foil Assist range.\u003c\/p\u003e\n\u003cp\u003eIf you already have a complete Foil Assist system and want more time on the water, this is the right buy. If you are building a setup from scratch, you will want to start with the \u003ca href=\"https:\/\/www.thesupco.com\/products\/duotone-foil-assist-set-al\"\u003eDuotone Foil Assist Set AL\u003c\/a\u003e instead. If your harness or battery box needs replacing, look at the \u003ca href=\"https:\/\/www.thesupco.com\/products\/dte-eharness-set-2026\"\u003eDuotone eHarness Set\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eIn simple terms:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose this battery set\u003c\/strong\u003e if you already own Foil Assist or Cruise and want a full spare pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose the Foil Assist Set AL\u003c\/strong\u003e if you need the actual motor, mast, remote, charger and full core system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose the eHarness Set\u003c\/strong\u003e if you need the wearable battery-carrying part of the system rather than the batteries themselves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the Duotone Battery 7A Set (2Pcs)?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne complete working set\u003c\/strong\u003e – the Duotone system needs two batteries connected at the same time, and this pack gives you exactly that.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore water time\u003c\/strong\u003e – ideal for riders who want a second set ready to go while the first one is charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreat for shared use\u003c\/strong\u003e – especially useful for families, coaching, schools or demo fleets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel-friendly format\u003c\/strong\u003e – each battery sits just under the typical 160Wh airline limit, making destination trips more realistic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurpose-built for Duotone\u003c\/strong\u003e – these are genuine Duotone Foil Assist batteries, not generic packs adapted from another application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent delivery\u003c\/strong\u003e – high-voltage LIHV chemistry helps the assist feel smooth and dependable throughout the session.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDuotone Battery 7A Set (2Pcs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDuotone Foil Assist and Duotone Cruise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLIHV \/ LiPo high-voltage lithium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7Ah per battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22.8V per battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnergy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e159.6Wh per battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1kg per battery \/ 2.2lb per battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical assist runtime\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 30–60 minutes per set, depending on rider, conditions and setup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTravel suitability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach battery is under the typical 160Wh airline threshold, subject to airline approval and current rules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2 x Duotone Battery 7A batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e charger, eHarness, battery box and other Foil Assist components are \u003cstrong\u003enot\u003c\/strong\u003e included.\u003c\/p\u003e\n\u003ch3\u003eExplore the Range\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.thesupco.com\/products\/duotone-foil-assist-set-al\"\u003eDuotone Foil Assist Set AL\u003c\/a\u003e – the core mast, motor and control system if you are starting from scratch\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.thesupco.com\/products\/dte-eharness-set-2026\"\u003eDuotone eHarness Set\u003c\/a\u003e – if you need the wearable harness and battery box setup\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.thesupco.com\/products\/dte-battery-bag-2026\"\u003eDuotone Foil Assist Battery Bag\u003c\/a\u003e – handy for safer storage and transport\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.thesupco.com\/collections\/electric-foil-boards\"\u003eShop electric foils, foil assist systems and accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHelpful Reading \u0026amp; Buying Advice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.thesupco.com\/blogs\/news\/duotone-foil-assist-vs-foil-drive-gen-2\"\u003eDuotone Foil Assist vs Foil Drive Gen 2\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.thesupco.com\/blogs\/news\/e-foiling-guide-uk-waydoo-vs-foil-drive-vs-duotone-foil-assist\"\u003eE-Foiling Guide UK – Waydoo vs Foil Drive vs Duotone Foil Assist\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eDo I really need two batteries for Duotone Foil Assist?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes. The Duotone Foil Assist and Cruise systems require two batteries connected together to operate. That is why this 2-piece set is so important — it gives you one complete usable battery setup.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eIs this the right product if I am buying Foil Assist for the first time?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eUsually, no. This is best seen as a spare or replacement battery set. If you are starting from scratch, the \u003ca href=\"https:\/\/www.thesupco.com\/products\/duotone-foil-assist-set-al\"\u003eDuotone Foil Assist Set AL\u003c\/a\u003e is normally the place to begin.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eHow long will a full set last on the water?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eAs a general guide, expect around 30 to 60 minutes of assist per set. Runtime depends on rider weight, foil efficiency, board size, water state, wind, how much throttle support you use and how efficiently you ride.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCan I take these batteries on a plane?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eThey are designed with travel in mind and each battery sits just under the common 160Wh airline limit. That said, airline policies vary, some require approval in advance, and lithium batteries are typically cabin-luggage only. Always check the latest rules with your airline before travelling.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eIs a charger included?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eNo. This product is the battery set only. If you need the wider system, charger or harness components, we would recommend looking at the full Foil Assist package or the relevant spare parts.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWho should buy a second battery set?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eIf you regularly do multiple sessions in a day, share one Foil Assist setup between riders, or run a coaching\/demo fleet, a second set makes a lot of sense. It cuts waiting time, keeps the day moving and makes the whole system more practical.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Duotone Foiling \u0026 Electric","offers":[{"title":"C99:random \/ 7A","offer_id":52952623743309,"sku":"9010583296791","price":766.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0904\/8381\/8829\/files\/Battery-Set.png?v=1765295524","url":"https:\/\/www.thesupco.com\/products\/duotone-foil-assist-battery-7a-set-2pcs","provider":"The SUP Company","version":"1.0","type":"link"}