{
 "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": "lithium-cells-14500-to-32650",
 "name": "Lithium cells: 14500, 16340, 18350, 26650, 32650",
 "kind": "hardware",
 "category": "Power & cooling",
 "group": "Batteries",
 "year": null,
 "question": "What are 26650 and 14500 battery dimensions?",
 "tags": [
  "battery",
  "cell",
  "lithium",
  "holder"
 ],
 "aliases": [
  "14500 battery",
  "26650 battery",
  "16340",
  "18350",
  "32650",
  "lifepo4 32650"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
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 "xem_status": "free-files",
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 "free_files": 5,
 "url": "https://xemstudio.com/objects/lithium-cells-14500-to-32650/",
 "sheet_txt": "https://xemstudio.com/objects/lithium-cells-14500-to-32650/sheet.txt",
 "sheet": {
  "basis": "IEC 61960 naming (first two digits diameter, next two length in mm, trailing 0 = cylindrical); real cells run slightly over nominal",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Nominal: 14500 Ø14 × 50 (AA-sized, 3.7 V, not interchangeable with AA), 16340 Ø16 × 34 (CR123A size), 18350 Ø18 × 35, 26650 Ø26 × 65, 32650 Ø32 × 65.",
   "Real cells and wraps add 0.2–0.5 mm to diameter and 0.3 mm to length; protected cells add 2–4 mm length. Design holders at nominal + 0.5 diameter, + 1.5 length.",
   "See the 18650 and 21700 entries for the two common pack cells."
  ],
  "table": {
   "columns": [
    "cell",
    "dia_mm",
    "length_mm",
    "design_holder_mm",
    "note"
   ],
   "rows": [
    [
     "14500",
     14,
     50,
     "Ø14.5 × 51.5",
     "AA size, 3.7 V"
    ],
    [
     "16340",
     16,
     34,
     "Ø16.5 × 35.5",
     "CR123A size"
    ],
    [
     "18350",
     18,
     35,
     "Ø18.5 × 36.5",
     "short 18650"
    ],
    [
     "18650",
     18,
     65,
     "Ø18.6 × 65.5",
     "see entry"
    ],
    [
     "21700",
     21,
     70,
     "Ø21.5 × 70.6",
     "see entry"
    ],
    [
     "26650",
     26,
     65,
     "Ø26.5 × 66.5",
     "high capacity"
    ],
    [
     "32650",
     32,
     65,
     "Ø32.5 × 66.5",
     "LiFePO4 common"
    ]
   ]
  }
 },
 "sheet_text": "Lithium cells: 14500, 16340, 18350, 26650, 32650 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/lithium-cells-14500-to-32650/  (CC BY 4.0)\nBasis: IEC 61960 naming (first two digits diameter, next two length in mm, trailing 0 = cylindrical); real cells run slightly over nominal\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Nominal: 14500 Ø14 × 50 (AA-sized, 3.7 V, not interchangeable with AA), 16340 Ø16 × 34 (CR123A size), 18350 Ø18 × 35, 26650 Ø26 × 65, 32650 Ø32 × 65.\n- Real cells and wraps add 0.2–0.5 mm to diameter and 0.3 mm to length; protected cells add 2–4 mm length. Design holders at nominal + 0.5 diameter, + 1.5 length.\n- See the 18650 and 21700 entries for the two common pack cells.\n\ncell  dia_mm  length_mm  design_holder_mm  note\n14500  14  50  Ø14.5 × 51.5  AA size, 3.7 V\n16340  16  34  Ø16.5 × 35.5  CR123A size\n18350  18  35  Ø18.5 × 36.5  short 18650\n18650  18  65  Ø18.6 × 65.5  see entry\n21700  21  70  Ø21.5 × 70.6  see entry\n26650  26  65  Ø26.5 × 66.5  high capacity\n32650  32  65  Ø32.5 × 66.5  LiFePO4 common\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- Wikipedia: Lithium-ion battery — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Lithium-ion_battery\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/index.json\nAPI: https://xemstudio.com/api/geometry?object=lithium-cells-14500-to-32650\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
  },
  {
   "publisher": "Wikipedia",
   "title": "Lithium-ion battery",
   "url": "https://en.wikipedia.org/wiki/Lithium-ion_battery",
   "formats": [
    "web"
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   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
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  "tolerance_mm": null
 },
 "related": [
  "18650-cell",
  "21700-cell",
  "aa-aaa-cells",
  "cr2032-coin-cell"
 ],
 "faq": [
  {
   "q": "What are 26650 battery dimensions?",
   "a": "Nominal Ø26 × 65 mm; real cells about Ø26.3 × 65.5. Design holders Ø26.5 × 66.5."
  },
  {
   "q": "Is a 14500 the same size as AA?",
   "a": "Same nominal Ø14 × 50 mm, but 3.7 V instead of 1.5 V; it fits AA holders and will damage AA-only devices."
  },
  {
   "q": "What are 16340 battery dimensions?",
   "a": "Ø16 × 34 mm, the rechargeable CR123A size; protected versions reach 36 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "cell-14500",
   "formats": [
    "step",
    "stl"
   ],
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/cell-14500.stl",
   "note": "14500 nominal Ø14.0 × 50.0"
  },
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   "file": "cell-16340",
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    "stl"
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   "price_usd": 0,
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   "stl": "https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/cell-16340.stl",
   "note": "16340 nominal Ø16.0 × 34.0"
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   "file": "cell-18350",
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    "stl"
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/cell-18350.step",
   "stl": "https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/cell-18350.stl",
   "note": "18350 nominal Ø18.0 × 35.0"
  },
  {
   "file": "cell-26650",
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   "note": "26650 nominal Ø26.0 × 65.0"
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  {
   "file": "cell-32650",
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/lithium-cells-14500-to-32650/cell-32650.stl",
   "note": "32650 nominal Ø32.0 × 65.0"
  }
 ],
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}