Like many areas of technology, wireless charging is going through simultaneous waves of consolidation and expansion. In core application areas, like smartphone charging, competing approaches are starting to come together in a unified whole, which will help achieve de facto standards. However, other groups are introducing new techniques which address other applications, such as electric cars, or enhance the capabilities for mobile devices. The past couple of years have seen device charging efforts largely coalesce around three groups. The Wireless Power Consortium’s Qi is the best established technology, but its magnetic induction approach is less flexible than the magnetic resonance systems adopted by newer specifications. This was pioneered in the mass market by the Alliance for Wireless Power (A4WP) with…