{"product_id":"21700-4p-adhesive-fish-paper-positive-terminal-insulator-rings","title":"21700 4P Adhesive Fish Paper Positive Terminal Insulator Rings","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003e21700 4P Adhesive Fish Paper Positive Terminal Insulators\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eProtect the positive terminal side of your 21700 battery modules with pre-cut adhesive fish paper insulators designed for straight 4P cell groups.\u003c\/p\u003e\n\u003cp\u003eEach insulator covers one four-cell parallel group and includes four terminal openings that leave the intended positive contact areas accessible while adding an insulating layer around the surrounding cell tops.\u003c\/p\u003e\n\u003cp\u003eThese pre-cut pieces help simplify battery-pack assembly by eliminating the need to measure and hand-cut individual fish paper rings for every 4P module.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for straight 21700 4P cell groups\u003c\/li\u003e\n\u003cli\u003eCovers four positive cell terminals with one connected piece\u003c\/li\u003e\n\u003cli\u003ePre-cut terminal openings\u003c\/li\u003e\n\u003cli\u003eAdhesive backing helps hold the insulator in position\u003c\/li\u003e\n\u003cli\u003eHelps protect cell wrappers around the positive terminals\u003c\/li\u003e\n\u003cli\u003eHelps isolate nickel, copper, and other conductive materials from the cell shoulders\u003c\/li\u003e\n\u003cli\u003eFaster and more consistent than cutting individual terminal rings\u003c\/li\u003e\n\u003cli\u003eAvailable in 10-, 12-, and 24-piece packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePack Size Options\u003c\/h2\u003e\n\u003cp\u003eEach insulator covers \u003cstrong\u003eone 21700 4P parallel group\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Pack:\u003c\/strong\u003e Covers up to ten 4P groups; suitable for a typical 10S4P pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-Pack:\u003c\/strong\u003e Covers up to twelve 4P groups; suitable for a typical 12S4P pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24-Pack:\u003c\/strong\u003e Covers up to twenty-four 4P groups; useful for two 12S4P packs, multiple builds, repairs, or spare material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm the number and arrangement of parallel groups in your specific battery design before ordering.\u003c\/p\u003e\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eThese insulators are commonly used for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e10S4P electric skateboard batteries\u003c\/li\u003e\n\u003cli\u003e12S4P electric skateboard batteries\u003c\/li\u003e\n\u003cli\u003eModular 21700 battery packs\u003c\/li\u003e\n\u003cli\u003eStraight four-cell parallel modules\u003c\/li\u003e\n\u003cli\u003eDIY electric-vehicle batteries\u003c\/li\u003e\n\u003cli\u003eRepairing or replacing damaged terminal insulation\u003c\/li\u003e\n\u003cli\u003eProtecting positive cell ends before installing nickel or copper conductors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Positive Terminal Insulation Matters\u003c\/h2\u003e\n\u003cp\u003eThe positive terminal area of a cylindrical lithium-ion cell sits close to the electrically negative outer cell can.\u003c\/p\u003e\n\u003cp\u003eDamaged wrappers, misplaced conductors, sharp nickel edges, or conductive material bridging this area may create a short circuit.\u003c\/p\u003e\n\u003cp\u003eA properly fitted fish paper insulator adds a protective barrier around the positive terminal and helps reduce the risk of conductive material contacting the cell shoulder or can.\u003c\/p\u003e\n\u003cp\u003eThese insulators are one component of a complete battery insulation system and should be used alongside intact cell wrappers, proper conductor placement, structural protection, and safe assembly practices.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell size:\u003c\/strong\u003e 21700\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParallel-group format:\u003c\/strong\u003e Straight 4P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Electrical insulation fish paper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacking:\u003c\/strong\u003e Pressure-sensitive adhesive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Positive terminal insulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal openings:\u003c\/strong\u003e Four per insulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable quantities:\u003c\/strong\u003e 10, 12, or 24 pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm the exact dimensions and hole spacing match your cell layout, holders, and conductor design before installation.\u003c\/p\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eConfirm that all cell wrappers and positive-terminal rings are undamaged.\u003c\/li\u003e\n\u003cli\u003eClean the cell tops and remove dust, oil, loose debris, or conductive material.\u003c\/li\u003e\n\u003cli\u003eTest-fit the insulator before removing the adhesive liner.\u003c\/li\u003e\n\u003cli\u003eAlign all four openings with the positive terminals.\u003c\/li\u003e\n\u003cli\u003eRemove the backing and apply the insulator evenly.\u003c\/li\u003e\n\u003cli\u003ePress the fish paper securely around each terminal area.\u003c\/li\u003e\n\u003cli\u003eConfirm that no material overlaps the required electrical contact points.\u003c\/li\u003e\n\u003cli\u003eInspect the completed module before spot welding or installing conductors.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eDo not force the insulator onto an incompatible cell arrangement or use it to conceal damaged cell wrappers.\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp\u003eChoose one:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e10 adhesive fish paper positive-terminal insulators\u003c\/li\u003e\n\u003cli\u003e12 adhesive fish paper positive-terminal insulators\u003c\/li\u003e\n\u003cli\u003e24 adhesive fish paper positive-terminal insulators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCells, nickel strip, copper, cell holders, wiring, and battery-building tools are not included.\u003c\/p\u003e\n\u003ch2\u003eImportant Safety Information\u003c\/h2\u003e\n\u003cp\u003eLithium-ion battery construction can cause fire, serious injury, or property damage if completed incorrectly.\u003c\/p\u003e\n\u003cp\u003eFish paper does not replace:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntact cell wrappers\u003c\/li\u003e\n\u003cli\u003eIndividual positive-terminal protection where required\u003c\/li\u003e\n\u003cli\u003eProper electrical spacing\u003c\/li\u003e\n\u003cli\u003eCorrect conductor design\u003c\/li\u003e\n\u003cli\u003eShort-circuit protection\u003c\/li\u003e\n\u003cli\u003eMechanical support\u003c\/li\u003e\n\u003cli\u003eComplete electrical testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBattery packs should only be assembled or repaired by someone familiar with lithium-ion cell handling, polarity, spot welding, insulation, and short-circuit prevention.\u003c\/p\u003e","brand":"TorqueBoards","offers":[{"title":"10 Pack","offer_id":52432902389991,"sku":null,"price":4.99,"currency_code":"USD","in_stock":true},{"title":"12 Pack","offer_id":52432902422759,"sku":null,"price":5.99,"currency_code":"USD","in_stock":true},{"title":"24 Pack","offer_id":52432902455527,"sku":null,"price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2363\/7649\/files\/217004PAdhesiveFishPaperPositiveTerminalRings.webp?v=1785456409","url":"https:\/\/diyelectricskateboard.com\/products\/21700-4p-adhesive-fish-paper-positive-terminal-insulator-rings","provider":"DIY Electric Skateboard","version":"1.0","type":"link"}