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iPhone 8 May Use Apple's In-House Inductive Wireless Charging Rather Than Technology From Energous

iPhone 8 May Use Apple's In-House Inductive Wireless Charging Rather Than Technology From Energous

The patents by themselves are not a clear indication of Apple's plans, but in one patent filed in 2011, Apple makes its feelings on radio frequency-based charging clear, calling it "very inefficient," "not practical," and potentially hazardous. In the interest of full disclosure, however, the patent was filed before any prospective relationship with Energous.
However, this type of radiative transfer is very inefficient because only a tiny portion of the supplied or radiated power, namely, that portion in the direction of, and overlapping with, the receiver is picked up. The vast majority of the power is radiated away in all the other directions and lost in free space. Such inefficient power transfer may be acceptable for data transmission, but is not practical for transferring useful amounts of electrical energy for the purpose of doing work, such as for charging electrical devices.

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