That's where the similarities end -- while the Touchstone is cylindrical and uses a proprietary wireless charging system, the Nexus 4 Wireless Charger is larger, spherical and Qi-compatible.

ENGADGET

This new network topography is ideal for use in public places such coffee shops, airports and arenas, enabling venues to monitor, upgrade and set policies for each Wireless Charging Spot from a centralized cloud-based system.

ENGADGET: Duracell Powermat adding mesh network, scaleable power to its wireless charging plates