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How accurate is the HR sensor on Mi band 2? Is it worth to buy one? What is the battery life of Mi band 2? How to use it exactly?
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The heart sensor on the Mi band 2 is accurate, but it is not completely accurate. It reaches a certain level of accuracy, but it is not completely accurate. You may need to exchange the heart sensor if it is not accurate. The HR sensor on the Mi band 2 is accurate, but it is not completely accurate. It reaches a certain level of accuracy, but it is not completely accurate. You may need to exchange the heart sensor if it is not accurate.

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The heart sensor of Mi Band 2 can provide reasonably accurate heart rate measurements, but it may not be as precise as medical-grade devices. It is suitable for everyday fitness tracking and monitoring, but not for medical diagnosis or treatment.
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This heart monitor is accurate or as close to accurate as you can get when it actually works. The Mi Band 2 has issues with monitoring your heart 2 out of 5 times. After 20 seconds the monitor will display an error on the screen because it failed to read your heartbeat. 

There are times the monitor will stop recording anything and refuse to sync up. The only way to get the monitor working again is by restarting your phone. The monitor will always display the data on the phone app so you can see what is happening. But the amount of data lost, the reading not working, and the sync between the monitor and the phone app, it isn't that reliable is you really need to monitor your heart all the time. 
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The heart rate sensor of the Mi Band 2 is generally considered accurate, and it is worth buying one. The battery life of the Mi Band 2 is approximately 20 days. To use it, you will need to install the Mi Fit app on your smartphone and pair it with your Mi Band 2. You can then use the app to track your heart rate, daily activity, and sleep.
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The heart sensor of Mi Band 2 can provide fairly accurate heart rate readings, but its accuracy may vary depending on individual factors such as skin type, motion, and fit.
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The heart sensor on the Mi band 2 is accurate, but it is not completely accurate. It does not track everything that goes on in the body, and that is why some people might find it inaccurate. The HR sensor is accurate for general activities, like walking and running, but it is not accurate for things like weightlifting oriqueness! The heart sensor does help with performance monitoring, but it is not perfect. It is easy to overthink how accurate a heart sensor is, and it can be difficult to use incorrectly. If you are trying to use the heart sensor to track something like weightlifting or unique activities, make sure to use the other sensor first.
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The heart sensor on the Mi band 2 is accurate, but it is not completely accurate. It reaches a certain level of accuracy, but it is not completely accurate. You may need to exchange the heart sensor if it is not accurate. The HR sensor on the Mi band 2 is accurate, but it is not completely accurate. It reaches a certain level of accuracy, but it is not completely accurate. You may need to exchange the heart sensor if it is not accurate.
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