Smartwatch

We are testing altogether four fitness watches by the manufacturers, Garmin and Polar; the Garmin Forerunner 935, the Garmin Forerunner 35, the Polar M400, and the Polar M200. The tracking qualities of the devices are convincing, and some offer additional functionalities.

Galaxy Note 7, iPhone, and Hoverboard fires have brought the safety of lithium-ion batteries into the spotlight. Although news coverage often implies that any fire or explosion is the result of incompetence, it's important to recognize the volatile nature of the battery technology itself, even under the best circumstances.