The first cell phones were roughly the size of a two-liter soda bottle and weighed two pounds. They offered less than an hour of talk time, and the cellular radio required hundreds of RF components. It is absurd to think we would carry such unwieldy contraptions today, but as next-generation smartphones become increasingly complex, phone engineers face a daunting challenge: trying to squeeze ever more functionality and bigger batteries into sleek, lightweight form factors without compromising performance.
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