Today only, CowBoom offers the Powermat Portable Charging Mat, model no. PMM-PT100, for $24.99 plus $5 for shipping. That's the lowest total price we could find by $17, although we saw it for a buck less in February. Sales tax is added where applicable. This mat wirelessly charges up to three Powermat-enabled devices and includes a universal powercube with eight tips for charging other electronics.