Do iphones contain lithium ion batteries?

I need to know if Iphones contain Lithium Ion Batteries.

Yes they do, don't open one, don't poke one, don't get one wet and don't feed after midnight

Http://www.apple.com/iphone/specs.html

Scroll down to the "power and battery" section and it says lithium ion batteries

Lithium Polymer (basically Lithium Ion)

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