Devon follows up the Tread 1 with a new timepiece that’s just as bold and much more efficient. The Tread 2 utilizes the same beautifully complex “Time Belt” system of the original watch which is now powered by a “Hybrid” movement that brings together mechanical components and a lithium polymer battery that keeps the watch charged for up to two weeks. When you need more juice the watch can be placed onto its charging cradle which fills the battery back to capacity using wireless induction charging.

http://monkeybait.com/2012/05/07/devon-thread-2/