{"product_id":"18650-dummy-battery-placeholder-shell-welding-practice-2-pack","title":"2-Pack 18650 Dummy Battery Placeholder Shell | Welding Practice","description":"\n\u003ch2\u003e2-Pack 18650 Dummy Battery Placeholder Shell\u003c\/h2\u003e\n\u003cp\u003eThese 18650 conductive dummy battery shells are the perfect training and practice aid for electronics technicians and factory employees learning battery spot-welding and assembly skills. Designed as 0V non-powered placeholders, they simulate the exact size and shape of a real 18650 cell so workers can practice welding positions, electrode alignment, and series-battery pack layouts without using live batteries.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrue 18650 Size:\u003c\/strong\u003e Matches standard 18650 dimensions — approximately 65mm tall × 18mm diameter — for accurate fitment in real battery holders and pack housings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e0V Conductive Design:\u003c\/strong\u003e Short-circuit positive-to-negative internal connection makes these shells act as a simple conductor when placed in series, completing a circuit without supplying any power.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries Use Only:\u003c\/strong\u003e Engineered strictly for series-connected configurations. Do \u003cstrong\u003enot\u003c\/strong\u003e use in parallel — the short-circuit design is incompatible with parallel battery arrangements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWelding Practice Aid:\u003c\/strong\u003e Ideal for training new employees in electronics factories to develop soldering and spot-welding technique on a safe, zero-voltage placeholder before working with real cells.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Charging Function:\u003c\/strong\u003e These are not real batteries and cannot be charged or discharged — they are purely structural and conductive placeholders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlat-End Design:\u003c\/strong\u003e Flat positive end mimics certain 18650 battery configurations for accurate assembly practice.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in Multiple Colors:\u003c\/strong\u003e Green, Red, Blue, and Yellow — great for position coding within multi-cell packs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 pieces per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~65 mm \/ 2.56 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~18 mm \/ 0.71 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0V (no power)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen, Red, Blue, Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSeries only\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMade in\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 × 18650 Dummy Battery Placeholder Shells\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFor series use only — never connect in parallel.\u003c\/li\u003e\n  \u003cli\u003eReal 18650 batteries are \u003cstrong\u003enot included\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003ePlease allow ±1–2 cm measurement variance due to manual measurement.\u003c\/li\u003e\n  \u003cli\u003eSlight color variation may occur due to different display settings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-nut-bolt-extractor-tool-kit-10-piece\"\u003e10-Pc Hex Nut \u0026amp; Bolt Extractor Kit 9–19mm | HIP Tools\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/105-degree-right-angle-driver-with-hex-screwdriver-bit\"\u003e105° Right Angle Driver with 1\/4\" Hex Screwdriver Bit | HIP\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-8-piece-hex-short-socket-set-vanadium-steel\"\u003e1\/2\" Drive 8-Piece Hex Short Socket Set – Vanadium Steel\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can the 18650 dummy battery placeholder shells be used in parallel battery configurations?\u003c\/h4\u003e\n\u003cp\u003eA: No. These 18650 dummy battery shells are designed for series use only. The internal short-circuit design between positive and negative electrodes makes them incompatible with parallel configurations, which could cause issues in a live circuit. Always use them in series alongside real 18650 batteries.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these dummy battery shells safe to use for welding practice in electronics training?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Because these placeholder shells carry 0V and contain no actual stored energy, they are a safe, practical tool for training new employees in soldering and spot-welding technique. They replicate the size and electrode positions of a real 18650 cell without any risk from live power sources.\u003c\/p\u003e\n\u003ch4\u003eQ: Do the 18650 dummy battery shells come with real batteries included?\u003c\/h4\u003e\n\u003cp\u003eA: No, real 18650 batteries are not included. These shells are purely structural and conductive placeholders used to fill or complete positions in a battery series pack during practice or assembly.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can the 18650 dummy battery placeholder shells be used in parallel battery configurations?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. These 18650 dummy battery shells are designed for series use only. The internal short-circuit design between positive and negative electrodes makes them incompatible with parallel configurations, which could cause issues in a live circuit. 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