We had reported earlier about a new form of wireless charging using high-frequency sound waves to charge smartphones and other devices located far away from the charger. Though there is no update yet on how close this project is to completion, news of another form of wireless technology employing magnetic resonance has emerged. Simply explained, this technology works by the electromagnetic field generated by current passing through a coil to generate current in another coil located in the vicinity.
WitriCity’s ‘Highly resonant magnetic induction technology’ allows charging over long distances by making the transmitting and receiving coils to vibrate at the same frequency. However, this system for charging laptops and smartphones is only 70% to 90% efficient. So hopes of it being used for smartphone charging can be shelved for the time being. In fact, the Wireless Power Consortium has even gone to the extent of stating that over-the-air charging may be next to impossible to achieve. On the bright side, though, WitriCity’s new technology can be used for charging cars with an efficiency of 92% to 94%.
Apple Inc is also said to be working on new wireless charging technology that Apple devices would start using beginning next year. As per Bloomberg reports, Apple is working on highly advanced technologies that would allow their devices to be charged from further away than the charging mats used with current smartphones. Google Inc, Samsung Electronics and Sony corp are amongst the other mobile giants that have incorporated wireless charging in their phones, though they still necessitate use of a charging pad.