{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "18650-cell",
 "name": "18650 lithium cell",
 "kind": "standard",
 "category": "Power & cooling",
 "group": "Batteries",
 "year": null,
 "question": "What are the exact dimensions of an 18650 cell for a holder?",
 "tags": [
  "battery",
  "cell",
  "holder"
 ],
 "aliases": [
  "18650",
  "18650 battery"
 ],
 "overall_mm": {
  "length": 65,
  "width": 18,
  "height": 18
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/18650-cell/",
 "sheet_txt": "https://xemstudio.com/objects/18650-cell/sheet.txt",
 "sheet": {
  "basis": "industry standard (IEC 60086 naming); nominal values",
  "overall_mm": {
   "length": 65,
   "width": 18,
   "height": 18
  },
  "notes": [
   "Nominal Ø18 × 65 mm; real cells run Ø18.2–18.6 mm and 65.0–65.3 mm, and protected cells up to ~69 mm long. Design holders for Ø18.6 and 65.5 unless you know the cell.",
   "Button-top adds about 0.5–1 mm; flat-top is the common unprotected form."
  ]
 },
 "sheet_text": "18650 lithium cell — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/18650-cell/  (CC BY 4.0)\nBasis: industry standard (IEC 60086 naming); nominal values\nCatalog version: 2026-10-20\n\nOverall (mm): length 65, width 18, height 18\n- Nominal Ø18 × 65 mm; real cells run Ø18.2–18.6 mm and 65.0–65.3 mm, and protected cells up to ~69 mm long. Design holders for Ø18.6 and 65.5 unless you know the cell.\n- Button-top adds about 0.5–1 mm; flat-top is the common unprotected form.\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: List of battery sizes — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/List_of_battery_sizes\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/18650-cell/index.json\nAPI: https://xemstudio.com/api/geometry?object=18650-cell\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "List of battery sizes",
   "url": "https://en.wikipedia.org/wiki/List_of_battery_sizes",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "21700-cell",
  "aa-aaa-cells",
  "neodymium-disc-magnets"
 ],
 "faq": [
  {
   "q": "What are the real dimensions of an 18650 cell?",
   "a": "Nominal Ø18 × 65 mm; real cells Ø18.2–18.6 and 65.0–65.3 mm, protected cells to about 69 mm. Design holders for Ø18.6 × 65.5."
  },
  {
   "q": "Button top vs flat top 18650 length?",
   "a": "Button-top adds about 0.5–1 mm; flat-top is the common unprotected form used in packs."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "cell-18650",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/18650-cell/cell-18650.step",
   "stl": "https://xemstudio.com/files/hardware/18650-cell/cell-18650.stl",
   "note": "18650 typical real size Ø18.3 × 65.2"
  }
 ],
 "markdown": "https://xemstudio.com/objects/18650-cell/index.md"
}