Commercial lithium ion batteries do not contain metallic lithium in the charged or uncharged state. They have lithium ions intercalated into the anode material in the charged state.
Primary (disposable) lithium batteries do contain metallic lithium in the charged state, and there are efforts to develop rechargeable batteries using pure lithium metal at the anode. Rechargeable batteries that contain metallic lithium anodes would be able to store more energy, but they are also more hazardous and currently have low cycle life.
Primary (disposable) lithium batteries do contain metallic lithium in the charged state, and there are efforts to develop rechargeable batteries using pure lithium metal at the anode. Rechargeable batteries that contain metallic lithium anodes would be able to store more energy, but they are also more hazardous and currently have low cycle life.