If not longer-lasting batteries, then we would appreciate easier charging methods. Why are we still charging smartphones with cables when wireless charging is already available and implemented on phones such as Nokia Lumia 920 and LG Nexus 4?
Even better, while wireless charging usually makes use of the electromagnetic induction concept, researchers at the University of Washington have found a new way of charging: a technique called ambient backscatter. Using this technique, we can repurpose the wireless signals already present around us as both a power source and a communication medium.
Imagine a futuristic smartphone with an infinite battery life because it gets charged using the wireless signals from other devices (for example, signals from a television tower). In other words, there’ll be no need for a conventional power source.
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