{"product_id":"3mm-copper-oxide-spot-welding-electrode-needles-18650-battery","title":"3MM Copper Spot Welding Electrode Needles – 18650 Battery Pack","description":"\u003ch2\u003ePrecision Copper Spot Welding Electrode Needles\u003c\/h2\u003e\n\u003cp\u003eUpgrade your battery spot welding setup with these high-quality \u003cstrong\u003e3MM Purple Copper Oxide Electrode Needles\u003c\/strong\u003e, designed specifically for 18650 power battery double-head spot welders. Crafted from premium copper for excellent electrical conductivity and durability, these electrodes deliver consistent, reliable welds every time.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-quality copper with copper oxide finish for superior conductivity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3 × 50 mm — a versatile fit for most standard spot welder pens and holders\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble-head design:\u003c\/strong\u003e Both ends usable, maximizing the lifespan of each electrode\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with:\u003c\/strong\u003e 18650 lithium battery packs and similar cell formats\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack options:\u003c\/strong\u003e Available in 2, 5, or 10 pieces — stock up and save\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConsistent performance:\u003c\/strong\u003e Ensures clean, precise weld points on battery tabs and nickel strips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCopper (Purple Copper Oxide)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDouble Head\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Battery Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18650 \u0026amp; similar lithium cells\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 \/ 5 \/ 10 Pieces per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2, 5, or 10 × Copper Oxide Spot Welding Electrode Needles (3 × 50 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e Manual measurements may vary by 2–3%. Actual product color may differ slightly from images due to monitor display settings.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-rubber-strain-relief-cord-boot-protector-sleeves-4-6-5-2-6mm\"\u003e10-Pack Rubber Strain Relief Cord Boot Protectors 4.6–6mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/25-in-1-precision-magnetic-screwdriver-set-pro-repair-tool-kit\"\u003e25-in-1 Precision Magnetic Screwdriver Set | Pro Repair Kit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/waterproof-cable-gland-set-pg7-pg9-nylon-connectors-10-pack\"\u003e10-Pack Waterproof Cable Glands PG7 PG9 Nylon Connectors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of spot welder are these copper electrode needles compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: These 3 × 50 mm copper oxide electrode needles are designed for use with standard 18650 battery spot welder pens and holders. They fit most handheld and benchtop spot welding machines that accept 3 mm diameter electrodes, making them ideal for DIY battery pack assembly and repair.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why choose copper oxide (purple copper) electrodes over standard electrodes?\u003c\/h4\u003e\n\u003cp\u003eA: Purple copper oxide electrodes offer superior electrical conductivity compared to many alloy alternatives. This means more efficient energy transfer during each weld, resulting in cleaner, more consistent weld points on nickel strips and battery tabs — essential for building reliable 18650 battery packs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How long do these spot welding electrode needles last?\u003c\/h4\u003e\n\u003cp\u003eA: Longevity depends on welding frequency and power settings. The double-head design effectively doubles usable life — simply flip the electrode when one end wears down. Stocking a multi-pack (5 or 10 pieces) ensures you always have fresh electrodes on hand for uninterrupted projects.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of spot welder are these copper electrode needles compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These 3 × 50 mm copper oxide electrode needles are designed for use with standard 18650 battery spot welder pens and holders. 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Stocking a multi-pack (5 or 10 pieces) ensures you always have fresh electrodes on hand for uninterrupted projects.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Batteries, Cables \u0026 Electronics\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/collections\/batteries-cables-electronics\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"3MM Copper Spot Welding Electrode Needles – 18650 Battery Pack\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/products\/3mm-copper-oxide-spot-welding-electrode-needles-18650-battery\"}]}\u003c\/script\u003e","brand":"QXL","offers":[{"title":"10pcs","offer_id":46962802819271,"sku":"14:202574831#10pcs","price":19.39,"currency_code":"USD","in_stock":true},{"title":"5pcs","offer_id":46962802852039,"sku":"14:201504127#5pcs","price":12.54,"currency_code":"USD","in_stock":true},{"title":"2pcs","offer_id":46962802884807,"sku":"14:203027829#2pcs","price":11.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/8314\/9255\/files\/Sf171a869788c40218fce565e6952b7feH.webp?v=1786048513","url":"https:\/\/qxlcustomerservice.com\/products\/3mm-copper-oxide-spot-welding-electrode-needles-18650-battery","provider":"QXL","version":"1.0","type":"link"}