{
  "node": {
    "id": "term:memory-effect",
    "type": "Term",
    "label": "Memory effect",
    "properties": {
      "id": "memory-effect",
      "name": "Memory effect",
      "section": "topic-charging",
      "definition": "A loss of usable capacity in nickel–cadmium cells repeatedly recharged from the same partial state. Lithium-ion cells do not show it in any practical sense, though LFP has a small related voltage memory.",
      "related": [
        "nickel-cadmium",
        "nickel-metal-hydride",
        "lfp"
      ],
      "url": "https://lemonergy.com/learn/glossary/memory-effect/",
      "mentions": [
        "usable-capacity"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:1208",
      "source": "term:memory-effect",
      "target": "topic:topic-charging",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:1209",
      "source": "term:memory-effect",
      "target": "term:nickel-cadmium",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1210",
      "source": "term:memory-effect",
      "target": "term:nickel-metal-hydride",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1211",
      "source": "term:memory-effect",
      "target": "term:lfp",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/memory-effect/usable-capacity",
      "source": "term:memory-effect",
      "target": "term:usable-capacity",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-charging",
      "type": "Topic",
      "label": "Charging and discharging",
      "properties": {
        "id": "topic-charging",
        "name": "Charging and discharging",
        "lede": "How current goes in and comes out, and the limits that stop it.",
        "context": "Separate regulation from availability.",
        "example": "The same CC–CV law can operate overnight or during a short depot stop.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open charging quantities"
      }
    },
    {
      "id": "term:nickel-cadmium",
      "type": "Term",
      "label": "Nickel–cadmium battery",
      "properties": {
        "id": "nickel-cadmium",
        "name": "Nickel–cadmium battery",
        "abbr": "NiCd",
        "section": "topic-other-chemistries",
        "definition": "A 1.2 V aqueous cell, rugged and able to deliver very high currents, but containing toxic cadmium and prone to the memory effect. It is now restricted in most consumer uses and survives in aviation and emergency lighting.",
        "related": [
          "memory-effect",
          "nickel-metal-hydride",
          "recycling"
        ],
        "url": "https://lemonergy.com/learn/glossary/nickel-cadmium/",
        "mentions": []
      }
    },
    {
      "id": "term:nickel-metal-hydride",
      "type": "Term",
      "label": "Nickel–metal hydride battery",
      "properties": {
        "id": "nickel-metal-hydride",
        "name": "Nickel–metal hydride battery",
        "abbr": "NiMH",
        "section": "topic-other-chemistries",
        "definition": "A 1.2 V aqueous cell with a nickel hydroxide positive electrode and a hydrogen-absorbing alloy negative. It powered hybrid cars for two decades and is tolerant of abuse, but lithium-ion stores two to three times more energy per kilogram.",
        "related": [
          "hybrid-vehicle",
          "memory-effect",
          "specific-energy",
          "bipolar-battery",
          "nickel-hydrogen"
        ],
        "url": "https://lemonergy.com/learn/glossary/nickel-metal-hydride/",
        "mentions": [
          "electrode",
          "positive-electrode"
        ]
      }
    },
    {
      "id": "term:lfp",
      "type": "Term",
      "label": "LFP",
      "properties": {
        "id": "lfp",
        "name": "LFP",
        "aka": [
          "lithium iron phosphate",
          "LiFePO₄"
        ],
        "section": "topic-chemistries",
        "definition": "A positive electrode material, LiFePO₄, giving cells a nominal voltage around 3.2 V, long cycle life and good thermal stability, but less energy per kilogram than nickel-rich oxides. Its flat voltage curve makes state of charge hard to read from voltage alone.",
        "related": [
          "cathode-active-material",
          "nmc",
          "lmfp",
          "ocv-soc-curve",
          "cycle-life"
        ],
        "lesson": "fundamentals/cell-anatomy/#voltage",
        "example": {
          "title": "Chemistry is not the whole datasheet",
          "text": "Two LFP products can differ in format, loading, capacity and current limits. Their cathode family alone does not make them interchangeable."
        },
        "url": "https://lemonergy.com/learn/glossary/lfp/",
        "mentions": [
          "electrode",
          "positive-electrode",
          "nominal-voltage",
          "discharge-curve",
          "state-of-charge"
        ]
      }
    },
    {
      "id": "term:usable-capacity",
      "type": "Term",
      "label": "Usable capacity",
      "properties": {
        "id": "usable-capacity",
        "name": "Usable capacity",
        "aka": [
          "available capacity"
        ],
        "section": "topic-ratings",
        "definition": "The part of a cell’s capacity that a system actually lets it use, after the BMS reserves margins at the top and bottom of the state-of-charge window. An electric-car pack may use 90–95 % of its gross capacity.",
        "related": [
          "nominal-capacity",
          "depth-of-discharge",
          "state-of-charge",
          "bms"
        ],
        "url": "https://lemonergy.com/learn/glossary/usable-capacity/",
        "mentions": []
      }
    }
  ]
}