The document discusses the history and evolution of electric kettles and mobile phones from the late 19th century to present day. Early electric kettles were inefficient with separately housed heating elements. The first to introduce an immersed heating element was the Bulpitt & Sons "Swan" kettle in 1922, doubling efficiency. The Russell Hobbs model K2 of the 1960s was a standard British kettle made of chrome and plastic. Mobile phones evolved from heavy, briefcase-sized "transportable" radiotelephones in the 1940s to the first true mobile phone released by Motorola in 1983. Smartphones like the iPhone revolutionized mobile technology by introducing multi-touch screens and apps.
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