{"product_id":"21700-heat-shrink-wrap-35mm-blue-roll","title":"21700 Battery PVC Heat Shrink Wrap - 35mm Flat Width - Cut-to-Length Roll - Blue","description":"\u003cp\u003eBlue PVC heat shrink tubing sized for 21700 lithium cells, supplied as a continuous cut-to-length roll. Cut each sleeve to exactly the length you need, whether that is a single cell, two cells end to end, or a custom length, and pay far less per cell than pre-cut sleeves.\u003c\/p\u003e\u003ch3\u003eHow many cells per roll\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5 meters: approx. 62 cells\u003c\/li\u003e\n\u003cli\u003e10 meters: approx. 125 cells\u003c\/li\u003e\n\u003cli\u003e20 meters: approx. 250 cells\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBased on about 80mm per sleeve (a 70mm cell plus overhang at each end). Your count will vary slightly with how much overhang you leave.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFlat width: 35mm (approx. 22mm diameter before shrinking)\u003c\/li\u003e\n\u003cli\u003eFits: 21700 cells\u003c\/li\u003e\n\u003cli\u003eColour: blue\u003c\/li\u003e\n\u003cli\u003eMaterial: PVC heat shrink film\u003c\/li\u003e\n\u003cli\u003eSold as a continuous roll, cut to length by you\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat it is used for\u003c\/h3\u003e\u003cp\u003eRewrapping harvested or salvaged 21700 cells, replacing torn or damaged factory wrap, and colour-coding cells during pack assembly. A cell with damaged wrap can short against a neighbouring cell or the pack housing, so rewrapping is a basic safety step in any rebuild.\u003c\/p\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eRemove the old wrap and any adhesive residue from the cell.\u003c\/li\u003e\n\u003cli\u003eFit an insulator ring over the positive terminal if the original was removed.\u003c\/li\u003e\n\u003cli\u003eCut a sleeve about 10mm longer than the cell (approx. 80mm for a 21700).\u003c\/li\u003e\n\u003cli\u003eSlide the sleeve over the cell, leaving an equal overhang at each end.\u003c\/li\u003e\n\u003cli\u003eApply gentle heat with a heat gun, turning the cell so the film shrinks evenly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eKeep the heat moving and do not overheat the cell. A hair dryer on high will also work, more slowly.\u003c\/p\u003e\u003ch3\u003eSafety\u003c\/h3\u003e\u003cp\u003eRewrapping does not repair a damaged cell. Cells that are dented, swollen, leaking, or that fail a capacity or internal resistance check should be recycled, not rewrapped.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"5 Meters","offer_id":49505587265763,"sku":"SW103","price":5.99,"currency_code":"USD","in_stock":true},{"title":"10 Meters","offer_id":49505588347107,"sku":"SW104","price":6.99,"currency_code":"USD","in_stock":true},{"title":"20 Meters","offer_id":67610424803555,"sku":"SW112","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-8869.png?v=1790879981","url":"https:\/\/renewspark.com\/products\/21700-heat-shrink-wrap-35mm-blue-roll","provider":"RenewSpark","version":"1.0","type":"link"}