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Lithium cells: 14500, 16340, 18350, 26650, 32650
What are 26650 and 14500 battery dimensions? · Hardware · basis: IEC 61960 naming (first two digits diameter, next two length in mm, trailing 0 = cylindrical); real cells run slightly over nominal
- sizes
- 7 in table
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.
Sizes
| cell | dia_mm | length_mm | design_holder_mm | note |
|---|---|---|---|---|
| 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 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | List of battery sizes | web | CC BY-SA 4.0 (text) |
| Wikipedia | Lithium-ion battery | web | CC BY-SA 4.0 (text) |
Free files
★ Free files 5 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| cell-14500 | 14500 nominal Ø14.0 × 50.0 | STEP · STL |
| cell-16340 | 16340 nominal Ø16.0 × 34.0 | STEP · STL |
| cell-18350 | 18350 nominal Ø18.0 × 35.0 | STEP · STL |
| cell-26650 | 26650 nominal Ø26.0 × 65.0 | STEP · STL |
| cell-32650 | 32650 nominal Ø32.0 × 65.0 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=lithium-cells-14500-to-32650
Fits with
Questions
What are 26650 battery dimensions?
Nominal Ø26 × 65 mm; real cells about Ø26.3 × 65.5. Design holders Ø26.5 × 66.5.
Is a 14500 the same size as AA?
Same nominal Ø14 × 50 mm, but 3.7 V instead of 1.5 V; it fits AA holders and will damage AA-only devices.
What are 16340 battery dimensions?
Ø16 × 34 mm, the rechargeable CR123A size; protected versions reach 36 mm.