Review on Smart bracelet Xiaomi Mi Smart Band 4 RU, black by Micha Kochaski ᠌

The first problem appeared right out of the box: there was no way to track heart rate. The bracelet's and app's settings did not persist. Only a complete reset from the manufacturer made any difference. The smartphone worked flawlessly for five months before it developed a new bug: the battery now dies in two days, even when all the features that "eat" the power are disabled. The problem persists even after returning to the factory defaults.