What makes a cell phone get smaller? No, it's not the price, but you are close!

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New phones are small because of the use of certain metals, such as copper, nickel, palladium, gold and tantalum, to help reduce the size of a cellular phone. Take, for example, the silver-gray precious metal tantalum, which is mined largely in Australia and Central Africa. Tantalum, a powder compacted for use in producing passive capacitors, has been a key factor in reducing the size of the mobile phone in recent years. The expensive and rare powder is used to build these capacitors that regulate voltage at high temperatures. More...

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