Product Overview


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 space.

Charges Any Battery-Operated Device That Requires Less Than 10 Watts

WattUp wire-free charging works with 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 makes 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 up to 5m (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 and dynamic pockets of energy are delivered via multiple miniature antenna arrays and custom control chips in the transmitter, or Power Router.  Highly efficient 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 Bluetooth Low Energy and enterprise-class wireless networking protocols.



WattUp™ transmitters, or “power routers,” deliver on-demand charging energy within a 15-foot radius of where they are installed, creating a 30-foot envelope of wire-free charging space.  Each of these power routers can charge up to 12 devices at the same time, so from tablets, mobile phones and wearables, your power needs are truly covered.  And the entire system is software controlled for flexible, accurate and efficient power delivery.     

More about transmitters »



WattUp™ receivers use multiple miniature antennas to harvest the micro energy beams sent from the transmitter.  This smart antenna technology means power is delivered in smaller, safer, and focused amounts.

More about receivers »



The entire WattUp™ wire-free charging system is software controlled.  Using either a mobile app or cloud-based web portal, you can to identify which devices you want to receive power, in which order of priority,  and even at what times you want the devices to charge.

For example, you could prioritize the charging of cell phones and tablets as soon as you come home from work, but while you are away, charge household devices such as sensors, remote controls, keyboards and mice.  It’s a fully customizable system, however, if you prefer a more hands-off approach, WattUp has the ability to automatically and intelligently prioritize and manage all of your charging needs.

More about software »


What is Energous Corporation's business model?

Energous Corporation is a technology and intellectual property licensing company which will leverage strategic partnerships to expand the WattUp™ ecosystem.

A partnership with, and license from, Energous may include proprietary chip technology and design libraries, scalable transmitter and receiver reference designs, software stacks from device firmware to cloud-based enterprise management tools, high volume technology transfer readiness documentation, custom design and applications engineering support, as well as patent, knowhow and comprehensive intellectual property coverage.

Through its membership in the Power Matters Alliance (PMA), partners will be able to test and obtain interoperability certification to the uncoupled specification.

How does WattUp™ work?

In simple terms, a WattUp™ transmitter sends energy via radio waves to paired devices containing complementary WattUp receivers.  The receivers convert those radio waves into DC power, which in turn charge the batteries on the receivers.

Is it safe?

WattUp™ transmits over the same radio frequency spectrum used by Wi-Fi routers and cordless phones, both time-tested and well-proven technologies.  This frequency is much less penetrative than a cellular phone signal, again a very well studied and regulated technology reference. 

 The RF energy is transmitted via numerous micro waveforms, each containing very small amounts of power, which are sent out in all directions within the room, reflecting off walls and surfaces in the same way as a Wi-Fi signal.  Hence, the energy density at any one point in the room is extremely low.  The waves are only sent when requested by a receiver device; if there are no receiver devices in the room, or if charging has not been requested by any devices present, the transmitter will then be entirely idle, and it will send no power at all.

 If a receiver does call for charge (via Bluetooth communication), the paired antennas on the receiver device focus some of the micro beams into a small pocket, and energy harvesting takes place, yet only locally to the device.  The receiver antennas are distributed, unlike cellular antennas, and hence the energy harvesting is also distributed, and not focused on any one hot-spot.

All of these provisions allow the WattUp system to deliver safe, efficient, and mobile power to all of your battery powered devices in the home or office.  The technology follows the same certification protocols required by mobile phones, Wi-Fi products and any consumer electronic product that communicates using a Radio Frequency signal.

Is it efficient?

WattUp™ transmitters sense and communicate with authorized receiver devices via Bluetooth Low Energy (BLE) and only send power when needed, and requested by those devices. WattUp is software controlled, intelligently determining which devices receive power, when, and in what priority. If there are no authorized devices within range, the WattUp transmitter becomes idle and no power is wasted.

Is it always on?

WattUp™ transmitters only send signals when directed to do so by the software.  The Bluetooth Low Energy communication channel, however, between the receiver devices and the transmitter is always open, allowing the location, orientation, battery condition and other pertinent information to be relayed within the system, even if charging is not required or requested.

What are the RF spectrums being used by WattUp™?

  • 2.4GHz (Unlicensed) for Bluetooth Low Energy communication
  • 5.8GHz Industrial, Scientific & Medical (ISM) unlicensed band for power transfer

What is the transmission power of WattUp™? 

WattUp™ power delivery is specified in terms of power delivered to each device. Because the system is software controlled, we specify the maximum power delivered to the maximum number of devices, for example:

Power Delivered to a Consumer Full-Featured Product

  • 4W delivered simultaneously to 4 devices, 0-5 feet 
  • 2W delivered simultaneously to 4 devices, 5-10 feet 
  • 1W delivered simultaneously to 4 devices, 10-15 feet 
  • Delivering on average 2W to 4 devices simultaneously within the charging envelope

Power can be managed remotely via a web interface and allocated to devices in 1⁄4 W increments with the band to a maximum of 12 devices at 1⁄4W.

What is the charging time of a device using WattUp™?

The WattUp™ system consists of a network of devices, and hence the charging time is determined by the number of units being charged simultaneously as well as the allocation of available power to each device, and the distance to the transmitter.

For the full consumer full-featured product:

  • <5 feet, with 4 devices calling for full power, devices charge at ~same rate as being plugged into the wall
  • 5-10 feet, with 4 devices calling for full power, devices charge at ~same rate as being plugged into a USB port on a computer
  • 10-15 feet, with 4 devices calling for full power, devices charge at ~1-2% per minute, depending on the device and how much charge it has remaining

The WattUp paradigm, however, is not about interrupting your routine because you are forced to have to charge your device, and hence the focus on "how fast will it charge?" or "how long do I need to wait?" It's about intelligent wireless battery, management averaged over time, so that you simply don't need to worry about having to actively "charge or change" a battery again.

How does WattUp™ use Bluetooth?

WattUp™ uses Bluetooth Low Energy (BLE) to communicate with up to 12 paired devices.

  • Bluetooth is used to link the Transmitter to the Receiver(s). 
  • Bluetooth is also used to identify location and orientation of the Receivers in 3D space. 
  • Bluetooth allows the WattUp™ software to monitor power levels in the Receiver devices. 

Bluetooth control also enables users to designate the level of power delivered for each receiver as well as the scheduling of power for all receivers on the system. This control allows for the cycling of power distribution for high priority devices (such as cell phones) during peak hours while charging lower-priority devices (TV remotes, cameras, etc.) during late night or off-peak times.

What are the target product segments for WattUp™?

Initially, WattUp™ is targeted at consumer electronic devices @ 10W and below:

  • Smart Phones, Phablets, eReaders and Small Tablets
  • Smart Phone Accessories, such as Charging Sleeves
  • Wearable Fitness Trackers
  • Smart Watches, and other Wearable Computing Devices
  • Computer Accessories, such as Wireless Keyboards and Mice
  • Remote Controls 
  • Home Device Networks
  • Home, Office and Commercial Wireless Sensors
  • Gaming Controllers
  • LED Lighting
  • Battery-Powered Children's Toys

What is the WattUp™ ecosystem enablement strategy?

Energous Corporation is taking a multifaceted approach to building a worldwide infrastructure for WattUp™ wire-free charging. 

Energous is partnering with Original Design Manufacturers (ODMs), Original Equipment Makers (OEMs) and Integrated Device Manufacturers (IDMs) that currently design and manufacture existing wireless products (e.g. Wi-Fi).

We are engaging key infrastructure providers and operators that have historically monetized new wireless technologies as they deliver them into the market (e.g. paid Wi-Fi zones).

We are working with multiple receiver product design and manufacturing companies in the target segments listed above, and Standards Bodies such as the Power Matters Alliance (PMA) to roll out the adoption of compatible consumer electronic produts.

We are actively seeking target destination partners for wire-free power to proliferate commercial location demand (e.g. coffee shops, restaurants, high traffic metro areas, malls, and airports).

How do I work with Energous on compliant reference designs?

By contacting Energous, companies can engage in partnerships, either through Joint Development Agreements (JDAs) or other forms of agreements and licensing contracts.   Partners will receive the support of our broad team of business professionals, and product design and deployment staff.  Our team, with over 1000 man-years in technology development and commercialization, has been deploying and debugging WattUp technology from end-to-end (silicon to system, hardware to software).  Reference designs are not only optimized to take advantage of the optimization gained from this depth of experience, but are also created with economic and regulatory issues front and center.  In short, your success is our success, and we will go the extra mile to ensure it!