NEVER BE POWERLESS. The Duracell Powermat Wireless Case for iPhone® 4/4S enables wireless charging on any Powermat or charging surface. To get started, simply slide your iPhone® 4/4S into the Wireless Case. Place iPhone® (enabled with a Wireless Case) on any Powermat to begin charging wirelessly. Are you new to Duracell Powermat? Get with the system. Our 24-Hour Power System has everything you need to get started: Powermat for 2 Devices, Wireless Case for iPhone® 4/4S, and a Portable Backup Battery.