Wireless chargers are about convenience. Plop your mobile device on a charging station and as long as it's within range (5mm or .20 in. for most chargers) it will power up, no wires needed (but at a slightly slower rate than a wired charger).
The technologies incorporated into most of these chargers is Qi, a standard developed by the Wireless Power Consortium. It transfers energy from the charger to your device through an electromagnetic field. If your phone doesn't have Qi built in, there are a variety of Qi-compliant cases available.
Meanwhile, a merger between the Alliance for Wireless Power (A4WP) and the Power Matters Alliance (PMA) could provide another alternative.
Need a boost? We've assembled one PMA and eight Qi-enabled chargers.