Powermat was perhaps the first company to enter this space, and it's still going strong with a sleek charging pad and fairly good device support. Like all such mat-based charging systems, you can't just take any electronic device and drop it on the pad to get it charging. You have to add a sleeve or adapter of some sort to your phone or other device in order for it to be able to work with the plug-less charging system. Users generally leave this sleeve affixed permanently to their phones. In the case of the Powermat sleeve, it adds a bit of bulk to the handset, with a small square piece jutting out the back of the phone. Powermat is not alone: Duracell's new myGrid offers much the same type of charging solution, again with a sleeve setup that lets the base unit interface with the handset directly. A single mat can charge four products at once. There are even specialized charging systems available for specific devices, like Energizer's mat designed to wirelessly charge your Nintendo Wii controllers.
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