Which action follows Halotron extinguishment of a lithium battery fire?

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After Halotron stops the flame, the remaining danger is heat. Lithium battery fires can rekindle if the cells stay hot, so removing heat is essential. Water has a high heat capacity and can absorb a lot of energy, cooling the battery pack and its surroundings to below the temperature at which the cells can react violently again. This cooling lowers the risk of reignition and further thermal runaway, making it the most effective follow-up action. Foam or smothering wouldn’t address the lingering heat, and ventilating or evacuating are not the immediate steps needed once the fire is out and the area is being cooled.