Matrix adds a solar cell to its battery-free smartwatch

In announcing the third in its range of battery-free smartwatches, Matrix Industries is going where few others have gone before. Whereas the first two PowerWatches relied upon thermocouples to generate power, the new model has two different ways to g...

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...