{
  "node": {
    "id": "term:room-temperature",
    "type": "Term",
    "label": "Room temperature",
    "properties": {
      "id": "room-temperature",
      "name": "Room temperature",
      "abbr": "RT",
      "section": "topic-testing",
      "definition": "The ambient temperature of a laboratory, usually taken as 23 or 25 °C. When a datasheet writes RT without a number the exact test temperature is unstated, and capacity, resistance and cycle life measured at 20 °C and 30 °C can differ.",
      "related": [
        "operating-temperature",
        "cycle-life",
        "datasheet"
      ],
      "url": "https://lemonergy.com/learn/glossary/room-temperature/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:belongsTo/term:room-temperature/topic:topic-testing",
      "source": "term:room-temperature",
      "target": "topic:topic-testing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:relatedTo/term:room-temperature/term:operating-temperature",
      "source": "term:room-temperature",
      "target": "term:operating-temperature",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:room-temperature/term:cycle-life",
      "source": "term:room-temperature",
      "target": "term:cycle-life",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:room-temperature/term:datasheet",
      "source": "term:room-temperature",
      "target": "term:datasheet",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-testing",
      "type": "Topic",
      "label": "Testing methods",
      "properties": {
        "id": "topic-testing",
        "name": "Testing methods",
        "lede": "The measurements and test procedures that characterise a cell or pack, from capacity and pulse tests to abuse and environmental tests.",
        "context": "Record specimen, state, instrument, temperature and timing.",
        "example": "Resistance immediately after a current step can differ from a ten-second value because slower polarization contributes.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open capacity measurements"
      }
    },
    {
      "id": "term:operating-temperature",
      "type": "Term",
      "label": "Operating temperature",
      "properties": {
        "id": "operating-temperature",
        "name": "Operating temperature",
        "section": "topic-ratings",
        "definition": "The temperature range a cell may be charged and discharged in, typically 0–45 °C for charging and −20–60 °C for discharging. Charging below 0 °C risks lithium plating; above the range the cell ages fast and may vent.",
        "unit": "°C",
        "related": [
          "lithium-plating",
          "arrhenius",
          "thermal-management",
          "datasheet"
        ],
        "lesson": "fundamentals/battery-aging/#temperature",
        "url": "https://lemonergy.com/learn/glossary/operating-temperature/",
        "mentions": []
      }
    },
    {
      "id": "term:cycle-life",
      "type": "Term",
      "label": "Cycle life",
      "properties": {
        "id": "cycle-life",
        "name": "Cycle life",
        "section": "topic-ratings",
        "definition": "The number of full charge–discharge cycles a cell completes before its capacity falls to a stated fraction, usually 80 %, of its initial value under defined conditions. LFP cells reach several thousand cycles; high-energy NMC fewer.",
        "unit": "cycles",
        "related": [
          "end-of-life",
          "capacity-fade",
          "depth-of-discharge",
          "calendar-life",
          "equivalent-full-cycle",
          "cycle-life-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/cycle-life/",
        "mentions": []
      }
    },
    {
      "id": "term:datasheet",
      "type": "Term",
      "label": "Datasheet",
      "properties": {
        "id": "datasheet",
        "name": "Datasheet",
        "section": "topic-ratings",
        "definition": "The manufacturer’s specification sheet for a cell: nominal capacity, nominal voltage, voltage window, continuous and peak currents, operating temperatures, dimensions, mass and cycle life, each tied to the test conditions it was measured under.",
        "related": [
          "nominal-capacity",
          "nominal-voltage",
          "operating-temperature",
          "cycle-life",
          "iec-62620"
        ],
        "lesson": "fundamentals/battery-basics/#datasheet",
        "url": "https://lemonergy.com/learn/glossary/datasheet/",
        "mentions": [
          "voltage-window"
        ]
      }
    }
  ]
}