When Matrix originally launched its crowdfunding campaign for the PowerWatch in 2017, the tagline was “Powered by You.” That’s not a bit of clever marketing jargon but a literal claim: the PowerWatch receives power from your body heat.
Specifically, the PowerWatch generates electricity from the temperature differential between your internally generated body heat and the ambient moisture in the air. Basically, cool air plus a warm body equals electricity, enough electricity to power the watch and its functions.
As long as the watch’s wearer is generating heat and it’s relatively cool out, the battery can recharge itself effectively endlessly. The only time the power drains out is if you take the PowerWatch off, though the device’s current version, the PowerWatch 2, does come with a thermal charging pad if you need to quickly juice it up before putting it on. The PowerWatch 2 also has a built-in solar power collector just to secure a little extra energy while you’re out and about.
