All bracelets are powered by FreeRTOS, which is very easy to use. The most primitive system is in the Mi Band 2, and the most advanced is in the Mi Band 4. All bracelets work smoothly and stably. After all, they don't have anything that would make them slow down. If we talk about memory, then this should also not be taken into account, since any software, as standard, cannot be installed without flashing. Therefore, the 16 MB ROM in the Mi Band 4 is designed mainly for dials. If you don't need them, then you shouldn't take this memory into account.

Battery

The autonomy of the Mi Band bracelets is Xiaomi's main feature, as there are still no competitors that can match these fitness trackers. All three bracelets show approximately the same results. With active use, their autonomy reaches from 1 to 2 weeks of time. If you use the bracelet as a watch, and generally rarely use it, then they will last for more than 1 month.

The battery capacity should not be taken into account, because the newer the model, the more features it can provide. Accordingly, there is a need for a more capacious battery. However, I would like to note once again that the autonomy of all three models is the same. And finally, over the years, the autonomy of bracelets (old models) does not decrease much. For example, after 1.5 years of use, Xiaomi Mi Band 2 still lasts 3-4 weeks under average loads. I'm talking about this from my own observations, as the owner of this fitness bracelet.

Functionality of fitness bracelets

I don't see any point in writing much about it, because everything that might be interesting to you has already been written out. Whether you need all these features is up to you. The more features, the newer the model and the more expensive it is. The main thing is that it makes sense for you to overpay if you don't use them.

Conclusion

If this is the first time you've looked at fitness bracelets, then you should choose either the second generation if you don't know much about technology, or the fourth generation if you know what you want. I don't see much point in buying the Mi Band 3 today, because unfortunately they don't have much functionality. If you already own the 2nd or 3rd generation, then it probably makes sense to buy the Mi Band 4 or already consider the best fitness bracelets from other brands, or even a smartwatch. After all, if you seriously consider buying one of them, you will find the store that is best suited for you. Alternatively, you can take a closer look at the second-hand market or Chinese online stores. By the way, about Xiaomi Mi Band 4. In the international market, it is called Xiaomi Mi Smart Band 4. Therefore, if you are targeting this particular bracelet, it is better to take the international version so as not to bother with flashing later. Check https://slin-go.ru for current welcome bonuses and promo codes.