Tagged With thermoelectric effect

One of the most interesting gadgets I've tested in the past few years was the Matrix PowerWatch: a fitness-tracking timepiece powered only by the wearer's body heat. The battery-free technology was neat, but the watch's limited functionality wasn't. Matrix Industries' new PowerWatch X promises to be a more useful and capable wearable, but even with infinite battery life, it still falls short of being a useful smartwatch.

What if, instead of frantically trying to find a power outlet when your smartphone is about to die, you simply had to hold it in your hand and scroll through Instagram for a while? That's the future the Matrix PowerWatch teases, because it's able to charge itself using nothing but the warmth of your body. Unfortunately there's a bit of a trade off I've noticed in my limited use, and infinite power comes with the need for some exceptional vision.