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Xiaomi Mi Band 9 review

Xiaomi Mi Band 9 review

On July 19, Xiaomi officially released the ninth generation Mi Band. While the price remains unchanged, the metal body, monitoring algorithm, battery life, etc. have been fully upgraded. So in today's environment where Android smartwatches are gradually entering the price range of less than a thousand yuan, can Xiaomi Mi Band 9 still be as dominant as before? Let us experience it.

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In terms of design, Xiaomi Mi Band 9 still has a family-like oval-shaped dial. This design has continued from the first generation of Xiaomi Mi Band to this day and has become the representative design of Xiaomi Mi Band.

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The material upgrade of the aluminum alloy middle frame makes Xiaomi Mi Band 9 more wear-resistant/scratch-resistant in daily life. Compared with previous products, the paint peeling problem has been greatly improved. In addition to the aluminum alloy material, Xiaomi Mi Band 9 also adds a ceramic middle frame version. The warm ceramic texture makes it more "elegant" when paired with different watch straps/necklace straps.


Although the screen part is still a 1.62-inch AMOLED screen, the maximum brightness can reach 1200nit, which is significantly improved compared to the 600nit peak brightness of Xiaomi Mi Band 8. It also supports brightness adaptive, so you don’t have to worry about the screen brightness being too high when you wake up at night. And dazzling.

 

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In terms of refresh rate, although the screen size of Xiaomi Mi Band 9 is not large, it supports a 60hz refresh rate, which makes the screen sliding smoothness, animation effect display and other experiences better. It can be said that except for the slightly smaller screen size, the screen quality of Xiaomi Mi Band 9 is definitely the first-tier performance among current Android wrist-worn devices.


In terms of sports and health, Xiaomi Mi Band 9 has also achieved a more comprehensive evolution this year. The dual-light detection module on the back achieves a 16% improvement in heart rate data accuracy through the newly upgraded dual-light single PD and optimized optical path design.

 

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After the heart rate data monitoring accuracy is improved, combined with the blood oxygen monitoring data, more accurate sleep information measurement including average heart rate and average blood oxygen saturation data can be achieved. Therefore, the latest Xiaomi Mi Band 9 will not only score the sleep quality and give reasonable sleep suggestions after sleeping, but also vividly match the user's portrait through an animal.

 

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However, obtaining animal portraits requires 7 days of sleep monitoring data. This experience was limited and no matching animal portraits were obtained.

 

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In terms of sleep monitoring accuracy, Xiaomi has exclusively cooperated with Peking University Third Hospital to implement sleep apnea monitoring function. Users can even go directly to the Peking University International Sleep Clinic for offline or online consultation through the sleep report on the Xiaomi Sports Health app, providing stronger professional endorsement.

 

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The number of sports monitoring types of Xiaomi Mi Band 9 has been upgraded to 159. It not only adds professional sports algorithms such as maximum oxygen uptake, recovery time, exercise effect, and maximum load. It also provides running pods for running users, which can be clipped to the shoelaces of running shoes to more accurately record data such as cadence and step height.

 

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In addition, there are basic running and walking combinations, advanced running and walking combinations, basic jogging, basic fat burning running, advanced fat burning running, MIIT fat burning running, basic aerobic endurance running, advanced aerobic endurance running, and basic interval running. , advanced interval running, and 10 running courses. Each course sets different exercise time, recommended heart rate range, and prompts through bright screen and vibration, which can provide more scientific and intuitive running guidance.

 

In terms of daily experience, Xiaomi Mi Band 9 can call different modules by sliding in different directions. Users can also customize the order of modules to achieve the most comfortable state for their daily use.

In addition, with the support of HyperOS, Xiaomi Mi Band 9 can not only become an NFC car key for Xiaomi cars and Lotus cars, but can also be linked with Switch, so you no longer need to hold the Switch controller in the game "Just Dance" , but you can use the bracelet to perform motion recognition to further free your hands.


As for the battery life, the official battery life of Xiaomi Mi Band 9 is up to 21 days. During three days of wearing, the bracelet turned on the AOD display and lost 15% of its power. Based on this, it can be inferred that it can meet the needs of two weeks of use, which is still OK for a bracelet product.

 

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So overall, as a regular updated model, Xiaomi Mi Band 9 is more optimized on the functions of previous products, using some updated technologies and an already compact body to win the favor of some users who pursue lightweight devices. .

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