When doctors give people “lithium,” is that the same lithium as in lithium-ion batteries?
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It’s the same element, yes. Lithium has quite a few interesting applications! It is used to treat bipolar disorder and in lithium and lithium-ion batteries. It is a metal that can be cut using a spoon, is used to make thermonuclear igniters, and also as a component of armor for army vehicles like tanks. All of this from the tiny element lithium.