Matrix PowerWatch hands-on: The promise of a world without chargers

When Matrix co-founder Douglas Tham handed me my review unit of the PowerWatch, I had to fight the instinct to ask for a charger. This thermal-powered wearable doesn't need one -- it gets energy by converting your body heat into electricity. It's bee...

The PowerWatch is a body heat-powered smartwatch that does very little

One of the biggest problems with smartwatches is avoiding a dead battery. Whether it's forgetting to plug them in in time, or having to fiddle with the unwieldy magnetic disk chargers, keeping a wearable juiced up is not as convenient as it should be...