{"product_id":"blue-pvc-heat-shrink-tubing-18650-battery-pack","title":"Blue PVC Heat Shrink Tubing for 18650 Battery Packs — Single to 4-Cell","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right flat width for my battery pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the circumference of your finished battery pack, then divide by 2 to get the required flat width. For a single 18650 cell (≈18.5mm diameter), a flat width of 29.5mm is typically correct. For 2-cell side-by-side packs, 50–60mm is generally appropriate. For 3- or 4-cell packs, 66–103mm covers most configurations. When in doubt, size up — PVC shrinks inward and excess material folds neatly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shrink ratio does this PVC tubing have?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC heat shrink tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heat is applied. This is generally sufficient for snug, wrinkle-free coverage on standard 18650 battery packs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature is needed to shrink this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC heat shrink tubing generally activates between 90°C–120°C (194°F–248°F). A heat gun on a low setting works well. Avoid open flames, which can scorch or unevenly shrink the material.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing safe for outdoor or high-humidity environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVC offers moderate moisture resistance and is suitable for indoor battery storage and light-duty portable applications. For prolonged outdoor exposure or high-humidity environments, consider pairing with additional sealing measures, as PVC is generally not rated for fully waterproof applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this tubing on battery chemistries other than 18650?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The flat width range (29.5–103mm) accommodates a variety of cylindrical cell formats beyond 18650, including 21700, 26650, and custom multi-cell packs, as long as the circumference falls within the tubing's coverage range.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the blue color affect the tubing's electrical insulation properties?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The blue pigment is cosmetic only. PVC heat shrink tubing in any color provides the same dielectric insulation properties. Blue is commonly used in DIY battery builds for color-coding positive or negative cell groups.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much tubing do I get per piece?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each piece is sized to wrap one standard 18650 cell or cell group (typically 65–75mm in length before shrinking). Exact pre-cut length per piece varies by flat width — see variant options or contact us to confirm the cut length for your chosen size.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eBlue PVC Heat Shrink Tubing for 18650 Battery Packs — Insulate, Identify \u0026amp; Protect Every Cell\u003c\/h2\u003e\n    \u003cp\u003eIf you've ever finished a DIY battery pack only to find loose, unprotected cells rattling around or shorting against each other, you know how critical proper cell wrapping is. This blue PVC heat shrink tubing for 18650 battery packs is designed for hobbyists, e-bike builders, power tool repair technicians, and anyone assembling or rebuilding lithium-ion battery packs who needs a clean, reliable wrap that goes on fast and stays put.\u003c\/p\u003e\n    \u003cp\u003eEach piece is a pre-cut section of blue PVC heat shrink tubing available in six flat widths — 29.5mm (≈1.16\"), 50mm (≈1.97\"), 60mm (≈2.36\"), 66mm (≈2.60\"), 85mm (≈3.35\"), and 103mm (≈4.06\") — covering single-cell 18650 wraps all the way up to 4-cell parallel or series pack configurations. Quantities are available in 1, 5, 10, or 50 pieces per order, so you can grab a sample or stock up for a full build run.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include rewrapping worn or damaged 18650 cell sleeves for flashlights and vaping mods, color-coding cell groups in e-bike battery packs for easy identification during maintenance, and protecting multi-cell spot-welded packs from abrasion and incidental contact during assembly and transport.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔋\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Sized for 18650 cylindrical cells and multi-cell packs. Flat widths 29.5–103mm also fit 21700, 26650, and other cylindrical formats — measure your pack circumference ÷ 2 to confirm the correct flat width before ordering.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 18650 Battery Heat Shrink Wraps\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSix Flat Widths in One Listing\u003c\/strong\u003e — From 29.5mm for single-cell 18650 wraps to 103mm for 4-cell pack configurations, one listing covers your entire build without hunting across multiple SKUs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eConsistent Blue Pigment for Color-Coding\u003c\/strong\u003e — Uniform blue color throughout the tubing wall makes it easy to distinguish cell polarity groups or battery pack types in multi-chemistry builds.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDielectric Insulation Layer\u003c\/strong\u003e — PVC material provides an electrical insulation barrier between cell bodies, reducing the risk of incidental shorts during assembly and in-service use.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLow Activation Temperature\u003c\/strong\u003e — Shrinks cleanly with a standard heat gun at generally 90°C–120°C (194°F–248°F), with no open flame required — safe for use around lithium cells.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Pack Sizes — 1 to 50 Pieces\u003c\/strong\u003e — Order a single piece to test fit on your pack design, or grab a 50-piece bulk pack for production runs, battery rebuilds, or workshop stock.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePre-Cut for Standard Cell Lengths\u003c\/strong\u003e — Each piece is cut to cover a standard 18650 cell body length, reducing prep time compared to cutting from a continuous roll during a build session.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — PVC Heat Shrink Tubing for 18650 Battery Packs\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePVC (Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003eTypically 2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eActivation Temperature\u003c\/th\u003e\n\u003ctd\u003eGenerally 90°C–120°C (194°F–248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Flat Widths\u003c\/th\u003e\n\u003ctd\u003e29.5mm (≈1.16\") \/ 50mm (≈1.97\") \/ 60mm (≈2.36\") \/ 66mm (≈2.60\") \/ 85mm (≈3.35\") \/ 103mm (≈4.06\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Cell Configurations\u003c\/th\u003e\n\u003ctd\u003eSingle 18650 (29.5mm) · 2-cell (50–60mm) · 3-cell (66–85mm) · 4-cell (85–103mm) — confirm by measuring pack circumference ÷ 2\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Cell Formats\u003c\/th\u003e\n\u003ctd\u003e18650, 21700, 26650, and other cylindrical cells within flat width range\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePre-Cut Length per Piece\u003c\/th\u003e\n\u003ctd\u003eSee variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e1 pc \/ 5 pcs \/ 10 pcs \/ 50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication Method\u003c\/th\u003e\n\u003ctd\u003eHeat gun (low setting); open flame not recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMoisture Resistance\u003c\/th\u003e\n\u003ctd\u003eModerate — suitable for indoor and light-duty portable use\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eSize Check Reminder:\u003c\/strong\u003e Before ordering, measure the circumference of your assembled battery pack and divide by 2 to get the required flat width. If your measurement falls between two sizes, choose the larger option for a cleaner finish.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right flat width for my battery pack?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure the circumference of your finished battery pack, then divide by 2 to get the required flat width. For a single 18650 cell (≈18.5mm diameter), a flat width of 29.5mm is typically correct. For 2-cell side-by-side packs, 50–60mm is generally appropriate. For 3- or 4-cell packs, 66–103mm covers most configurations. When in doubt, size up — PVC shrinks inward and excess material folds neatly.\u003c\/p\u003e\n        \u003cp\u003e\u003cem\u003eExample: A 2S2P pack measuring 120mm circumference ÷ 2 = 60mm flat width.\u003c\/em\u003e\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat shrink ratio does this PVC tubing have?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePVC heat shrink tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heat is applied. This is generally sufficient for snug, wrinkle-free coverage on standard 18650 battery packs.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat temperature is needed to shrink this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePVC heat shrink tubing generally activates between 90°C–120°C (194°F–248°F). A heat gun on a low setting works well. Avoid open flames, which can scorch or unevenly shrink the material — and should never be used near lithium cells.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing safe for outdoor or high-humidity environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePVC offers moderate moisture resistance and is suitable for indoor battery storage and light-duty portable applications. For prolonged outdoor exposure or high-humidity environments, consider pairing with additional sealing measures, as PVC is generally not rated for fully waterproof applications.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this tubing on battery chemistries other than 18650?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. The flat width range (29.5–103mm) accommodates a variety of cylindrical cell formats beyond 18650, including 21700, 26650, and custom multi-cell packs, as long as the circumference falls within the tubing's coverage range. Measure first to confirm fit.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes the blue color affect the tubing's electrical insulation properties?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eNo. The blue pigment is cosmetic only. PVC heat shrink tubing in any color provides the same dielectric insulation properties. Blue is commonly used in DIY battery builds for color-coding positive or negative cell groups, or to distinguish pack voltage tiers in multi-pack systems.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow much tubing do I get per piece, and how is length measured?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eEach piece is pre-cut to cover one standard 18650 cell or cell group. Exact cut length per piece varies by flat width. See variant options for details, or contact us to confirm the cut length for your chosen size before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use a hair dryer instead of a heat gun to shrink this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA hair dryer generally does not reach the activation temperature needed for PVC heat shrink tubing (typically 90°C+). In most cases, a dedicated heat gun is required for a clean, uniform shrink. Embossing heat tools can work in a pinch but may be slower and less even than a proper heat gun.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your flat width and quantity above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Blue \/ 29.5mm \/ 1pcs","offer_id":52310781985042,"sku":"LFLGZYYSG0486x1","price":2.08,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 50mm \/ 1pcs","offer_id":52310782017810,"sku":"LFLGZYYSG0487x1","price":2.28,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 60mm \/ 1pcs","offer_id":52310782050578,"sku":"LFLGZYYSG0488x1","price":2.39,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 66mm \/ 1pcs","offer_id":52310782083346,"sku":"LFLGZYYSG0489x1","price":2.45,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 85mm \/ 1pcs","offer_id":52310782116114,"sku":"LFLGZYYSG0490x1","price":2.6,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 103mm \/ 1pcs","offer_id":52310782148882,"sku":"LFLGZYYSG0491x1","price":2.86,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 29.5mm \/ 5pcs","offer_id":52310782181650,"sku":"LFLGZYYSG0486x5","price":3.47,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 50mm \/ 5pcs","offer_id":52310782214418,"sku":"LFLGZYYSG0487x5","price":5.37,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 60mm \/ 5pcs","offer_id":52310782247186,"sku":"LFLGZYYSG0488x5","price":6.24,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 66mm \/ 5pcs","offer_id":52310782279954,"sku":"LFLGZYYSG0489x5","price":6.7,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 85mm \/ 5pcs","offer_id":52310782312722,"sku":"LFLGZYYSG0490x5","price":8.3,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 103mm \/ 5pcs","offer_id":52310782345490,"sku":"LFLGZYYSG0491x5","price":10.27,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 29.5mm \/ 10pcs","offer_id":52310782378258,"sku":"LFLGZYYSG0486x10","price":6.15,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 50mm \/ 10pcs","offer_id":52310782411026,"sku":"LFLGZYYSG0487x10","price":9.81,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 60mm \/ 10pcs","offer_id":52310782443794,"sku":"LFLGZYYSG0488x10","price":11.42,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 66mm \/ 10pcs","offer_id":52310782476562,"sku":"LFLGZYYSG0489x10","price":12.32,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 85mm \/ 10pcs","offer_id":52310782509330,"sku":"LFLGZYYSG0490x10","price":15.72,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 103mm \/ 10pcs","offer_id":52310782542098,"sku":"LFLGZYYSG0491x10","price":19.65,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 29.5mm \/ 50pcs","offer_id":52310782574866,"sku":"LFLGZYYSG0486x50","price":26.76,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 50mm \/ 50pcs","offer_id":52310782607634,"sku":"LFLGZYYSG0487x50","price":45.68,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 60mm \/ 50pcs","offer_id":52310782640402,"sku":"LFLGZYYSG0488x50","price":53.94,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 66mm \/ 50pcs","offer_id":52310782673170,"sku":"LFLGZYYSG0489x50","price":58.47,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 85mm \/ 50pcs","offer_id":52310782705938,"sku":"LFLGZYYSG0490x50","price":75.58,"currency_code":"USD","in_stock":true},{"title":"Blue \/ 103mm \/ 50pcs","offer_id":52310782738706,"sku":"LFLGZYYSG0491x50","price":95.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of12_c1b7fa24-b239-4906-a1d8-db382f71db74.jpg?v=1780500788","url":"https:\/\/homediyer.com\/de\/products\/blue-pvc-heat-shrink-tubing-18650-battery-pack","provider":"HomeDIYer","version":"1.0","type":"link"}