Ownership of wearable electronics from a Chinese manufacturer often confronts users with the first surprise already at the unpacking stage. Many owners who have bought the Xiaomi Mi Band 4 find that the device does not respond to touching the screen immediately after being removed from the box. This is not a manufacturing defect or a sign of a malfunction of the gadget. The manufacturer deliberately delivers activity trackers with a discharged battery to ensure the safety of the lithium polymer battery during long-term storage and transportation.
The initial launch process requires a certain sequence of actions, ignoring which can lead to a false conclusion that the device is inoperable. The key is to connect the tracker to the power source before you try to pair it with a smartphone. If you try to find the device through Bluetooth while its screen is black, the search will not give results, since the wireless module in sleep mode does not broadcast the signal.
In this article, we will discuss in detail the activation algorithm of your bracelet, consider the nuances of working with the charger and analyze the possible reasons for the lack of response to charging. The instructions will also help those who are faced with a situation where a previously working device suddenly stopped turning on. Understanding the physical principles of the charging contact and the software features of the firmware will quickly bring the gadget back to life.
Primary activation and charging features
The first and most important step before any attempt to turn on is to connect the bracelet to the charger. Complete with the Mi Band 4 comes a special docking station, which is a special docking station. USB-A connector with two contacts and a notch for the tracker capsule. You need to remove the tracker itself (capsule) from the silicone strap and insert it into the charger with metal contacts down.
It is important to ensure tight fit of contacts. Often users make the mistake of inserting the capsule not to the end or at an angle, which causes the electrical circuit to not close. The indicator of successful connection is the appearance on the bracelet icon battery with lightning. If the screen remains black, this does not always mean breakage; the battery can be deeply discharged, and it takes time to accumulate a minimum charge.
⚠️ Warning: Do not use powerful Quick Charge, Power Delivery adapters to charge the bracelet. Currents greater than 1A can damage the capsule's power controller. Use standard power adapters. USB-port of computer or adapter with current 0.5-1A.
The initial charge time can range from 30 minutes to 2 hours depending on the degree of discharge. If after 10-15 minutes on the charger the screen does not catch fire, try to wipe the contacts on the capsule and charger with dry cloth, as oxidation or fat from the skin can prevent the passage of current.
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Before long-term storage, charge the bracelet to 60-80% to avoid a deep discharge that could irreversibly damage the battery.
Connection with a smartphone and installation of Mi Fit
Once the image or charging icon appears on the screen, you can move to the software part of the setup. To fully work, the Xiaomi Mi Band 4 requires installing a specialized application. Currently, the main application is Mi Fitness (formerly known as Zepp Life or Mi Fit, depending on the region and version of the firmware), you need to download it from the official Google Play store or the App Store.
The account registration process is a mandatory requirement of the security of the Xiaomi ecosystem. Without creating a profile or logging into an existing Mi Account, the application will not allow you to add a new device. After authorization, go to the Profile section and click Add Device. From the list, select your tracker.
The app will ask for permission to use Bluetooth and geolocation. These permissions are critical: Bluetooth is required to communicate with the bracelet, and geolocation (GPS of the phone) is required by the Android operating system to scan peripherals. If you reject these requests, finding the device will be impossible, and you will not be able to complete the setup.
When the app starts searching, a vibration pairing request may appear on the bracelet screen, confirm the action by pressing the tracker touch button, and after successful connection, there will be automatic time-date synchronization, and possibly a firmware update of the device.
Control of the interface and touch button
The Mi Band 4 interface is based on touch OLED-It's a display and one physical button, which is essentially part of the screen, and it's swiped and it's controlled by short taps. Understanding the logic of the menu is necessary to “wake up” the device or change the settings if the standard wrist-raising switch is disabled.
The main way to activate the screen is to raise your hand, but if you just charged the bracelet or it lay still for a long time, the first start is better done by force, you need to press and hold your finger on the screen area for 2-3 seconds, this action is similar to pressing the power button on other gadgets.
- 🔋 Long press – turn on / off the screen, start the selected function, confirm the action.
- 👆 Swipe up – go to the next dial or notification menu (depending on the settings).
- 👇 Swipe down – opening a quick menu (lightlight, Do Not Disturb mode, phone search).
- 👈 Swipe left/right – switching between widgets (pulse, steps, weather, heart rate).
You can set the screen behavior in detail in the application settings, for example, you can set the time during which the screen remains active after waking up (5, 10, 15 seconds or constantly), and you can also use the wrist lifting function to turn on the screen, which is recommended to activate for ease of use.
☑️ Checking screen settings
Diagnosis: why the bracelet is not turned on
When Xiaomi Mi Band 4 does not respond to charging or does not turn on, is one of the most common problems. Before carrying the device into the service, you need to conduct a thorough diagnosis, often the cause lies in the banal contamination or software failure, which is easily fixed at home.
One common cause is oxidation of the contacts, where sweat, skin fat and moisture are put on the metal pads at the back of the capsule, and over time, this creates an insulating film that prevents charging. Dry the contacts carefully with a cotton swab dipped in alcohol or a special electronics cleaner and let them dry.
⚠️ Warning: If the bracelet was in salt water (sea, pool with bleach), the contacts may have been corroded, in which case simple cleaning may not help, and you will need to mechanically clean the contacts with fine sandpaper or professional cleaning in an ultrasonic bath.
Another reason could be software freezes, a bracelet is a minicomputer, and its operating system can go into a cycle of errors, in which case rebooting helps. Since there is no physical reset button, the deep discharge method is used: leave the bracelet on charge for a long time (until full charge), and then try resetting through the application.
Resetting settings and flashing the device
If standard on-boarding methods don't work, you might need to do something more radical, like factory reset or flashing, and you can do it through the menu of the bracelet itself, if the screen lights up sometimes, and you can find System or More in the widget list, you can choose Unbind or Factory Reset.
The flashing process is usually initiated automatically by the Mi Fitness app if it detects a mismatch in the software version. However, if the process is interrupted or the file is damaged, the bracelet can turn into a brick, in which case the method of “treatment” through multiple charging and discharging helps.
| Problem. | Probable cause | Method of decision | Difficulty |
|---|---|---|---|
| Black screen when charging | Deep discharge or oxidation | Cleaning contacts, long-loading | Low. |
| Vibration's on, no screen. | Display or plume malfunction | Replacement of screen module | Tall. |
| Not connecting to the phone. | Bluetooth or software error | Reconnect, reinstall the application | Low. |
| Quick discharge. | Battery wear and tear | Battery replacement | Medium |
For advanced users, there is the option of using third-party firmware tools such as mi-band-firmware-hacker, but this requires caution. Wrong firmware can permanently bring the device down, so only use this method if you are confident in your actions and understand the risks.
What is Deep Sleep Mode?
Modes of operation and energy saving
Understanding the Mi Band 4’s operating modes helps to effectively manage energy and avoid situations where the device suddenly turns off.The main modes are active use, standby mode (the screen is off but the tracker is working), Do Not Disturb mode and sleep mode.
In Do Not Disturb, the bracelet doesn't vibrate when alerted, and doesn't light up when you raise your hand, which saves you a charge. However, the tracker itself keeps counting steps and pulse. If you see the battery setting too fast, check your pulse rate settings. Setting a 1-minute interval instead of 30 minutes will significantly extend the autonomy.
- 🌙 Sleep mode – automatically detects sleep phases, requires an active tracker at night.
- 🏊 Sports regimes – activate GPS (over the phone) and frequent survey of sensors, strongly planted battery.
- 🔕 Silence mode – only disables sound and vibration notifications, leaving the screen active.
⚠️ Warning: Constantly using the Constant Time Display feature (if available in custom dials) or setting too bright lights reduces battery life by 40–50%.
Optimizing the settings allows you to achieve the manufacturer's stated 20 days of operation, although in reality, when actively used with notifications and pulse measurement, the Mi Band 4 lives about 7-10 days. Regular synchronization is also important, since overflowing the notification buffer memory can cause malfunctions.
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The optimal balance between functionality and autonomy is achieved by turning off constant pulse measurements and using standard dials without complex animations.