Owners of the fourth version of the popular activity tracker often face strange situations when the device stops responding to touch. The main reason is usually a complete battery discharge, which requires the right approach to energy recovery. If you first encountered this gadget, you may find it difficult to find a port to connect the cable, since the manufacturer has applied a hidden charging design.
Unlike earlier models, there is no need to remove the tracker from the strap, which greatly simplifies the maintenance process. However, there are certain nuances regarding current strength and contact position, ignoring which can lead to the fact that the device will not turn on. Understanding the principles of operation of the lithium polymer battery will help you extend the life of the gadget and avoid common errors.
Next, we’ll take a closer look at all the steps of connecting to the network, explain the meaning of light indicators, and provide solutions for cases where the standard procedure does not work. Following simple rules of operation will allow you to enjoy the Xiaomi Mi Band 4 for many months without sudden shutdowns.
Design of charging interface and preparation
Xiaomi’s fourth generation bracelets have built-in pins hidden on the inside of the tracker.You don’t have to look for removable plugs or use the special docking stations that came with the first versions of the Mi Band. The connection uses the original cable that comes with the kit, which has a specific connector shape that fits tightly into the device’s body.
Before starting the procedure, make sure that the metal contacts are free of dust, sweat or moisture. Contact oxidation is a common reason why current stops flowing into the battery. Wipe the inner surface of the tracker with a dry soft cloth, paying attention to the two golden areas located closer to the lower edge.
It's important to understand that the contact pads are made of metal and can become tarnished over time. If you wear the bracelet during exercise, salt sweat can create an oxide film that prevents charging, and regular cleaning of this area is a prerequisite for the stable operation of the device.
- 🔌 Make sure that USB-original or certified cable, as cheap analogues may not provide the required current.
- 💧 Never try to charge a wet device, even if it has water protection. IP68.
- 🧼 Use a dry cotton swab to clean the indentations around the contacts.
💡
To clean the contacts, use a cotton swab slightly soaked in isopropyl alcohol, but be sure to let the surface dry completely before connecting to the network.
Once the surface is ready, you can move to a physical connection. The design of the cable is designed to minimize the risk of error, but the force should be moderate when inserted. You should feel a slight click or tight fit when the connector is in place.
Step-by-step instructions for connecting to the network
The process of energy recovery in the Mi Band 4 is as simple as possible and does not require complex manipulations, the main thing is to correctly orient the tracker relative to the charger. The cable has a convex part that should coincide with the recess on the body of the bracelet.
☑️ Correct connection of the bracelet
Put it in. USB-connector to any standard port with a current of 5V. This can be a port of a computer, laptop or adapter from a smartphone. However, be careful with using heavy-duty chargers for flagship phones, as they can automatically detect the device and deliver increased current, which is undesirable for a small battery tracker.
It is best to use adapters labeled 5V 1A or 5V 2A. If you connect the bracelet to a USB 3.0 port on a computer, it can charge more slowly due to the power limitations of the port, but it is absolutely safe for electronics.
⚠️ Note: Do not use damaged cables with broken insulation, as power surges can cause the power controller to fail.
Once the connection is established correctly, the screen should light up. If that doesn't happen, try moving the cable slightly or rubbing the contacts again. Sometimes it takes several attempts to find the right angle of contact.
Decoding of indicators and charging statuses
Understanding the signals your fitness tracker is sending will help avoid unnecessary worry: The screen of the device is monochrome, but it clearly reports the status of the battery. Immediately after you connect, you will see a battery icon that may be empty or partially filled.
During charging, the battery icon will be animated or flashing, indicating an active current. When the device is fully charged, the animation will stop, and the icon will become static and full. The time it takes for this process depends on the degree of discharge and power source.
Notice how the screen behaves when it's connected, if it lights up and goes out after a second, it may have been a security breach or it's not stable, and normally it should be on or showing the time while it's accumulating energy.
| Status of the indicator | Meaning | User action |
|---|---|---|
| Blinking battery icon | Active charging is underway. | Waiting for completion |
| Static full battery | Charge 100% | Shut off the network. |
| The screen is not responding. | No contact or deep discharge | Wipe your contacts, check the cable. |
| Lightning badge | Standby charging mode | Check the USB connection |
Some users notice that the bracelet may warm slightly during charging, which is a normal physical reaction of a lithium polymer battery to passing current, but if the heat becomes noticeable, the procedure should be stopped immediately.
Charging time and autonomy of the device
One of the strengths of the Xiaomi Mi Band 4 is its energy efficiency: the built-in battery capacity is only 135 mAh, allowing the device to run for up to 20 days in normal use.
Full charge from zero to 100% takes an average of 1 to 1.5 hours. If you put the device on charge regularly without waiting for full discharge, the process can take only 30-40 minutes. Fast energy recovery speed is a great convenience for active users.