Matrix Industries’ announced the original PowerWatch back in 2016 with an intriguing, if somewhat hard to believe claim: a watch that used a proprietary thermoelectric energy converter to power the timepiece exclusively from excess body heat. And while the original PowerWatch did live up to those claims, it was somewhat limited in what it could actually do, with the first-generation more or less limited to basic fitness tracking.
This year, the new Matrix PowerWatch X takes another step forward by adding notifications. It’s not a big step, but it makes the new X more like a smartwatch than the previous version. It also measures steps and, like the original model, can do accurate calorie counting (according to Matrix) by measuring electrical energy output that your body’s expending.