CowBoom offers the Powermat Portable Charging Mat in Black, model no. PMM-2PX, for $14.99 plus $5.24 for shipping. That's the lowest total price we could find by $5, although we saw a 3-device mat with Powercube for $2 less two weeks ago. This mat wirelessly charges up to two Powermat-enabled devices at once and comes with a travel case.