The Challenge of True Mobility: Untethered Power

The world continues its inexorable march to mobility with mobile technologies are entering every aspect of our lives. Today’s widely used mobile devices – smartphones and tablets – are being joined by watches, sensors, wearables and so many more appliances supported by innumerable new applications. However, mobile devices are not truly mobile if they require connection to the power cord. Untethered re-charging is the final challenge to true mobility.

Wi-Charge technology provides us finally a way of getting rid of the power cord, efficiently and safely.
Our technology makes charging at home, at the office, or in public places – practically anywhere – effortless and automatic enabling complete self-sufficiency in mobile devices.

Technology Overview

Wi-Charge’s technology is unique in its ability to deliver useful power over long distances efficiently and safely. Power is delivered over distances using infrared beams of light. The system consists of two units:

Power is delivered over the air by a virtual photonic power cord™.

Transmitter and Receivers

The transmitter is a very smart device. Within its coverage area, it automatically identifies chargeable devices and discovers their power requirements. It delivers power to receivers based on their priority, power requirements, battery level and other parameters. Multiple clients can be charged simultaneously using an intelligent power-management algorithm embedded in the transmitter. Automatically, the transmitter directs a safe infrared beam to each receiver, establishing a Virtual Photonic Power Cord™. No light is spread outside of the beam; 100% of the power delivered from the transmitter reaches the receiver.

Depending on size and power requirements of the charging device, the tiny thumb size receiver is automatically illuminated by the invisible infrared beam. The receiver converts power from the beam to an electric charge which is used to power the device or recharge its battery. Determined by the requirements of the devices and the application, the tiny receiver may be embedded in the mobile device or plugged externally into an existing charging port.

Wi-Charge receivers contain a photovoltaic cell, miniature optics and electronic hardware. We also offer receivers with a micro-USB or a Lightning output connector for aftermarket consumer applications such as phone- and tablet-charging. Wi-Charge also offers a simple two-wire output with custom voltage supply for special applications.

Power Delivery

Efficient power delivery via light necessitates a great deal of intelligence in the transmitter. The process of client identification and power delivery is performed automatically without any user intervention. For example, the mobile-phone user simply enters the room and the transmitter will automatically find it and begin charging it. The receiver is detectable by the transmitter even if the device’s battery is drained, and it will stop charging the device once the battery is full.

Line of Sight

Power flows in a straight, narrow line. If, for any reason, the line of sight between the transmitter and receiver is blocked, transmission stops immediately. This ensures that power emission levels are always compliant with safety standards and international regulations. Once line of sight is restored, charging restarts automatically. To ensure steady power delivery, each Wi-Charge receiver is equipped with an energy storage buffer (capacitor or battery) that automatically bridges sporadic interruptions.


In addition to power delivery, the transmitter and receiver share a communication channel which enables data delivery between the units, and whose payload is application dependent and customizable. This communication channel can enable identification of the properties of the receiving device, enabling efficient power flow, information transfer channel for various applications etc.

Product Features