"18650" meaning in Translingual

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "18",
        "3": "65",
        "4": "0"
      },
      "expansion": "18 + 65 + 0",
      "name": "compound"
    }
  ],
  "etymology_text": "18 + 65 + 0. Named for the nominal dimensions of a fresh battery: 18 millimeter diameter by 65 millimeter length. The final 0 is common to the name of many cylindrical cell batteries.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "noun"
      },
      "expansion": "18650",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries, commonly used as component batteries in battery packs for some electronics and electric cars."
      ],
      "id": "en-18650-mul-noun-4TPv3RPK",
      "related": [
        {
          "word": "2170"
        },
        {
          "word": "21700"
        },
        {
          "word": "4680"
        },
        {
          "word": "46800"
        }
      ],
      "synonyms": [
        {
          "word": "1865"
        }
      ]
    }
  ],
  "word": "18650"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "18",
        "3": "65",
        "4": "0"
      },
      "expansion": "18 + 65 + 0",
      "name": "compound"
    }
  ],
  "etymology_text": "18 + 65 + 0. Named for the nominal dimensions of a fresh battery: 18 millimeter diameter by 65 millimeter length. The final 0 is common to the name of many cylindrical cell batteries.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "noun"
      },
      "expansion": "18650",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "noun",
  "related": [
    {
      "word": "2170"
    },
    {
      "word": "21700"
    },
    {
      "word": "4680"
    },
    {
      "word": "46800"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Translingual compound terms",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual nouns",
        "Translingual terms spelled with numbers"
      ],
      "glosses": [
        "A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries, commonly used as component batteries in battery packs for some electronics and electric cars."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "1865"
    }
  ],
  "word": "18650"
}