After the battery of a smart bracelet has been completely discharged, many users are faced with a strange situation: the device is charged, the indicator is lit up, but the screen is still black. This is a common behavior for wearable electronics, when the Li-Pol battery goes into deep discharge. You should not panic or look for a service center, because in 90% of cases the device is serviceable and requires only the correct activation.
In this article, we will discuss in detail all the nuances of launching Xiaomi Mi Band 4. You will learn why the bracelet does not respond immediately, how to properly conduct the initial synchronization and what to do if the gadget “hangs”. It is important to understand that the process of turning on can take from a few seconds to a couple of minutes, depending on the state of the power controller.
The first thing you need to do is to ensure that you have a steady flow of energy, and often the problem is not with the device itself, but with oxidized contacts or low current in the charging unit, and let's look at a step-by-step algorithm that can help you reanimate the activity tracker.
Primary activation and charging of the device
If your fitness bracelet has been discharged for a long time, the chemical processes inside the battery may have slowed down. It takes time to start an electrochemical reaction. Connect the tracker capsule to the charger. Make sure the contacts on the capsule and on the charging dock fit tightly together. Often dust or sweat interfere with normal current.
Once connected, there may be no symbols on the screen for 5 to 10 minutes. This is normal for deep sleep. Modern lithium polymer batteries have over-discharge protection, and the controller needs to accumulate a minimum charge to start the operating system. Don't try to turn the device on every minute, let it lie on charge.
⚠️ Warning: If the bracelet is heated during charging, disconnect it immediately from the mains.Heating may indicate a battery malfunction or short circuit inside the case.
To speed up the process, use a power supply with no more current 1 Ampere: High-powered Quick Charge-enabled smartphones may not correctly detect a low-power device. USB-port of the computer or old power supply 5V/0.5A. This will ensure a gentle entry into service mode.
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Use a soft cloth slightly moistened with alcohol to wipe the contacts before charging – this improves conductivity and speeds up the start of the device.
Incorporation process and status indication
When the minimum charge threshold is reached, the Xiaomi Mi Band 4 display will show a picture of the battery. From that moment, the main charging cycle begins. The screen will light up, and you will see a percentage of charge or animation. If this did not happen in 15-20 minutes, the software lock may have worked.
In some cases, the system can hang on the logo or black screen, despite the charge, which is a simple reboot. There is no physical button on the bracelet, so you use the touch zone, you need to find a small recess on the capsule (touch button) and press it, holding your finger for 10-15 seconds.
A long press forcefully breaks the power supply and starts the system again, which is the equivalent of rebooting the computer, and if after that procedure the Amazfit logo or MI appears on the screen, then the device is alive, and now it is important to prevent re-discharge to a critical level.
- 🔋 The indicator flashes green - the charging process is underway, the battery is less than 90%.
- 🟢 The indicator is always green – the device is fully charged.
- 🔴 The indicator flashes red - a critical charge level or battery error.
- ⚪ Lack of reaction – deep discharge or faulty contacts.
☑️ Diagnostics of inclusion
Synchronization with the Mi Fit application
Once the smart bracelet is successfully turned on, you need to link it to your smartphone. Without this step, many features such as setting a time and date may not work properly. Download the official Mi Fit app (or Zepp, since the platform has been renamed) from Google Play or the App Store.
Launch the app and register for Xiaomi. Then go to the profile and select Add Device. In the list, find the Amazfit Band 4 or Mi Band 4. It is important to keep the bracelet next to your smartphone while searching. The pairing process requires confirmation on the tracker screen if it is already activated.
The first connection may require a firmware update. The firmware contains bug fixes that may have caused problems with inclusion in the past. Do not interrupt the update process and keep devices close together.
What to do if your phone doesn’t see the bracelet?
Resetting and reconnecting
If the bracelet is turned on but is not running smoothly or transmitting data, it may be necessary to reset to factory settings.This will return the device to its original state by removing all accumulated data and configuration errors. In the bracelet menu, find the "System" or "More" section, then select "Unbind".
Once the tracker menu is disconnected, you need to remove the device from the app on your phone, go to profile, click on the bracelet name and select "Delete." Only then you can re-pair the pairing procedure, which clears the old encryption and setting keys.
| Action. | Where to go | The result |
|---|---|---|
| Untie (Unbind) | Menu bracelets | Resetting Bluetooth communications |
| Remove the device | Application Mi Fit | Cleaning up profile cache |
| Reset (Reset) | Bracelet menu (if any) | Complete data cleanup |
| New pairing | Application Mi Fit | Fresh setup |
When you reconnect, the story will be downloaded back.
Solving screen freeze problems
Sometimes users are faced with a situation where the display is on but not responding to touch, or shows a static picture. This is a software failure of the tracker operating system. Unlike smartphones, there is no combination of buttons to reboot, except for a long press on the sensor.
If a long press (more than 20 seconds) doesn't help, try the "discharge" method. Leave the bracelet uncharged until it sits completely and turns off. Then put it back on charging. Sometimes the full discharge and charge cycle helps the controller reset the error.
⚠️ Warning: Do not attempt to open the bracelet body to remove the battery.This will result in loss of warranty and possible damage to the water protection.
Also, the problem may be in the app itself. Make sure you have the latest Mi Fit installed. Older versions of the software may not work properly with newer versions of the bracelet firmware, causing conflicts in synchronization and power management.
Prevention and care of the battery
In order not to wonder how to turn on the Xiaomi Band 4 after charging, you should follow simple rules of operation. Lithium polymer batteries do not like extremes: full discharge to zero and constant charging to 100% followed by overheating.
Try to charge when the energy level drops to 15-20%, which will prolong the battery life, and avoid using the bracelet at extremely low or high temperatures, as this affects the chemical composition of the electrolyte.
Clean the back panel and charging contacts with dry cloth. Sweat and moisture contain salts that, when dried, create an oxide film that prevents charging. Clean contacts are key to fast and safe charging of your gadget.
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Regular cleaning of contacts and avoiding full discharge increase the battery life of Xiaomi Band 4 by one and a half times.