{"product_id":"ampper-side-post-battery-disconnect-switch-12v-24v-knife-blade-cut-off-kit-solid-brass-200a","title":"Ampper Side-Post Battery Disconnect Switch 12V\/24V Knife-Blade Cut-Off Kit — Solid Brass, 200A","description":"\u003cp\u003e\u003cstrong\u003eThe Ampper side-post knife-blade battery disconnect switch is a compact master cut-off that isolates GM-style 3\/8\" side post batteries for safe, convenient power shut-off on cars, boats, RVs and ATVs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned to sit on the side-post terminal, this two-position on\/off switch uses a lift-out knife blade to break the circuit and stop parasitic drain when a vehicle or vessel is stored. Built from solid brass for corrosion resistance and supplied as a complete kit, it supports DC systems from 12V to 24V with heavy-duty current ratings appropriate for starting and accessory circuits.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this switch physically disconnect my battery?\u003c\/h3\u003e\n\u003cp\u003eThe switch uses a knife-blade contact that lifts out of the terminal housing to create an open circuit. In the ON position the blade completes the connection; lift it and the circuit opens, cutting power to everything wired through that post.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eKnife-blade design: quick lift to interrupt power.\u003c\/li\u003e\n  \u003cli\u003eTwo-position operation: simple on\/off control.\u003c\/li\u003e\n  \u003cli\u003eMounts on side post with supplied bolts, spacers and washers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it fit my battery and electrical system?\u003c\/h3\u003e\n\u003cp\u003eIt is sized for GM-style side post batteries and any battery with a 3\/8\" side-post terminal hole. The switch is recommended for installation on the negative side of the battery and supports both 12V and 24V DC systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 3\/8\" side post terminals only (GM-style).\u003c\/li\u003e\n  \u003cli\u003eRated for 200A continuous at DC systems and 600A momentary at 12V.\u003c\/li\u003e\n  \u003cli\u003eIncludes short and long bolts plus spacers to fit varying post heights.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and safe is the Ampper switch for marine and vehicle use?\u003c\/h3\u003e\n\u003cp\u003eThe switch body and contacts are made from solid brass to resist rust and corrosion, making it suitable for harsh environments like boats or exposed engine bays. Its simple mechanical action minimizes failure modes compared with more complex electronic isolators.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid brass construction for corrosion resistance and longevity.\u003c\/li\u003e\n  \u003cli\u003eSimple mechanical knife-blade reduces electrical failure points.\u003c\/li\u003e\n  \u003cli\u003eCan be locked alongside other switches for added security.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the kit include and how easy is installation?\u003c\/h3\u003e\n\u003cp\u003eThe Ampper kit arrives with the switch, two pairs of 3\/8\" side-post bolts (one short pair, one long pair), two spacers and two washers so you can size the connection to your battery post. Installation is straightforward with basic hand tools; mount the switch to the side post and secure with the supplied hardware.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete hardware included for immediate installation.\u003c\/li\u003e\n  \u003cli\u003eRecommended tools: wrench set, possibly a torque wrench for correct bolt tightness.\u003c\/li\u003e\n  \u003cli\u003eClear on\/off operation—lift blade to disconnect power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Ampper side-post knife-blade battery disconnect is intended for vehicle, boat, RV and ATV owners who use GM-style side-post batteries and want a reliable, manual way to prevent battery drain, secure electrical systems during storage, or add a simple master switch for maintenance and theft deterrence. It suits DIY installers and professionals who need a compact, corrosion-resistant cut-off that handles starter-level currents without complicated wiring.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this switch be used on top-post batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This Ampper model fits side-post batteries with a 3\/8\" hole only; top-post batteries require a different style of disconnect.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What currents can the switch handle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports 200A continuous and up to 600A momentary at 12V, suitable for starting and accessory loads.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Ampper","offers":[{"title":"Default Title","offer_id":55164061253975,"sku":"B0CKR51YST","price":33.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ampper-side-post-switch-front-view.jpg?v=1790349561","url":"https:\/\/britishgarage.co.uk\/products\/ampper-side-post-battery-disconnect-switch-12v-24v-knife-blade-cut-off-kit-solid-brass-200a","provider":"British Garage","version":"1.0","type":"link"}