Rezence introduced a new idea for wireless charging: one intelligent surface, multiple devices, more freedom in position — powered through loosely coupled magnetic resonance.
Rezence was built around “spatial freedom”: charging without exact coil alignment, supporting different device types and enabling transmitters to disappear into ordinary surfaces.
Loosely coupled resonators offered more horizontal and vertical tolerance than the tightly aligned inductive pads of that era.
A single Power Transmitter Unit could coordinate multiple receivers with different power needs on the same surface.
The concept extended into desks, tables, vehicle consoles and public spaces — making the surface itself part of the charging system.
Energy moved through the resonant magnetic field, while Bluetooth Low Energy handled device discovery, control, power negotiation and protection.
The transmitter identified valid receiver devices through the out-of-band Bluetooth link.
Each receiver communicated its power requirements so the surface could manage different loads.
The PTU energized the resonant field and supplied power without requiring exact physical contact.
The comparison below describes the competitive context at the time Rezence was promoted. Modern Qi and AirFuel specifications have evolved significantly since then.
Loosely coupled magnetic resonance
Tightly coupled coil-to-coil transfer
The brand’s life was brief, but the core vision — alignment-free resonant power embedded into everyday environments — continued through the AirFuel ecosystem.
The Alliance for Wireless Power began developing a loosely coupled wireless power interoperability specification.
A4WP launched the consumer-facing Rezence name, combining “resonance” and “essence.”
The alliance announced support for higher-power devices including tablets, PCs and peripherals.
A4WP and PMA combined under the AirFuel Alliance; resonant wireless power continued as AirFuel Resonant.
The real proposition was not another accessory. It was an infrastructure layer: surfaces that quietly delivered power wherever devices naturally came to rest.
Work surfaces that power a phone, headset and computer accessories without cable clutter.
Flexible charging zones embedded in the center console.
Power integrated into tables, rooms and shared public spaces.
One managed surface serving multiple device classes — a precursor to today’s ambient-power thinking.
AirFuel Resonant now carries forward the central promise: alignment-free wireless charging for multiple devices on an enabled surface. Rezence remains an important milestone in how the industry learned to imagine wireless power.
Visit AirFuel AllianceKey specifications and dates were cross-checked against industry announcements, technical literature and the present-day AirFuel Alliance.