Apple 正秘密研髮長距離無線充電功能，無線充電技術是與 Energous 公司的 WattUp 技術結合實現的，WattUp 射頻系統一個類似於無線網絡的系統，它可以在15英尺內發射信號到另一個接收器裝置上從而實現安全的遠距離無線充電功能。
以下是 Energous 公司官方原文介紹：
True Mobility
Wire-free power delivers on the promise of true mobility, the freedom to roam where you want to without worrying about your mobile or battery powered devices running out of charge. While power cords and charging pads require you to surrender your device to a stationary location, WattUp™ gives you the freedom to receive a charge from anywhere within a 30-foot end-to-end charging envelope.
Charges Any Battery-Operated Device That Requires Less Than 10 Watts
WattUp™ wire-free charging can be integrated to provide wire-free charging to a wide variety of electronic devices such as cell phones, tablets, wearables, cameras, wireless keyboards and mice, headsets, sensors, LED lights, remote controls and toys; in essence any battery-powered device in your home or office.
Works Like Wi-Fi
A WattUp™ transmitter, or Power Router, sends energy via a radio frequency (RF) signal to your WattUp-enabled electronic devices when requested. A WattUp receiver in each device converts that signal into battery power.
The entire system is software controlled, so it's intelligent and customizable to your needs and environment. And, because it's designed to work invisibly in the background, WattUp can make low battery anxiety a thing of the past.
How Does it Work?
A Radio Frequency (RF) system, similar to a Wi-Fi system, delivers safe wire-free charging energy at a distance of approximately 15ft from a transmitter to a receiver device, such as a mobile phone, and maintains charging while the receiver is in motion. 12 receiver devices can be managed by the system simultaneously.
The Hardware
Highly targeted pockets of energy are delivered via multiple miniature antenna arrays and custom control chips in the transmitter, or Power Router. Energy harvesting of the micro energy beams from these pockets then takes place via paired antenna arrays and custom chips in the receiver devices.
The Software
The WattUp™ software system ensures that the charging waveforms are dynamically directed, focused and controlled via proprietary algorithms. Charging and communication between transmitters and receivers is intelligently managed using BLE and enterprise-class wireless networking protocols.
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