Smarter Smartphones Take Charge Without Cables

Smarter Smartphones Take Charge 1,500 NUMBER OF U.S. CHARGING SPOTS USING THE A4WP Without Cables WIRELESS STANDARD The long-understood principle of induction is powering new innovations in wireless charging for smartphones and other devices. WATTS NEEDED TO POWER SOME LEADING WIRELESS PHONES Wireless charging for smartphones currently involves a charging base that plugs into an outlet. Some phones require a special "receiver case" to facilitate a wireless charge; some new devices do not. 4.7"× 2.4" DIMENSIONS OF NOKIA + Charging bases built into tables and countertops are already popping up in cafes, airport lounges and shopping malls, paving the way for WIRELESS CHARGING PLATE an always-charged future. PLUG TO WALL OUTLET RECEIVER COIL BATTERY WIRELESS CHARGING BASE TRANSMITTER COIL 3 Alternating current from a wall outlet flows into a When a battery-powered The receiver coil transmits device and its internal the voltage into the wireless charging base and "receiver coil" is brought device's battery. through the "transmitter coil" inside of it, generating a close enough, the magnetic field induces an short-range magnetic field. electric current. It's Betamax vs VHS All Over Again Who's Fighting to Become the Universal Standard in Wireless Charging Qi Power 2.0 A4WP VS VS (pronounced chee) POWER MATTERS ALLIANCE FOR WIRELESS POWER CONSORTIUM ALLIANCE WIRELESS POWER 21