Xiaomi’s modern wearables have proven to be reliable tools for tracking physical activity and sleep. However, even the most advanced tracker requires regular energy replenishment to work properly. Many users, when they first encounter a fitness bracelet, may encounter difficulties when first charging, since the process of removing the capsule and installing it on the dock is not always intuitive. In this article, we will discuss in detail all the steps of connecting the device to the network.
Mishandling the charger or attempting to charge the tracker without being removed from the strap can damage the contacts or the body itself. It is important to understand that the Mi Smart Band 4 design involves modularity, where the main element is a removable capsule, which contains a lithium polymer battery and contact areas that require a direct connection to the docking station.
Before starting charging, you must make sure that the power adapter used is serviceable and USB-The standard current for this device is 5 volts, which corresponds to most modern power supplies from smartphones. If you’re using a powerful Power Delivery adapter from a laptop, the device will still take as much as it needs, but it’s better to be safe and use a standard port. USB 2.0 or 3.0 on a computer or a regular 1 Amp adapter.
Construction and preparation for charging
One of the key features of the fourth model is its waterproof body, which is achieved by fitting the capsule tightly into a silicone strap. To access the contacts, you need to carefully remove the tracker from the frame. Don't be afraid to make efforts, but they must be directed correctly: hold the strap with one hand, and push the capsule with your thumb from the recess on the back side.
On the bottom of the device, you'll see two golden contacts that are used to transmit power and synchronize data. These contact areas should be perfectly clean. Oxidation or contamination with sweat and dust can cause the bracelet to stop charging. Wipe them with a soft dry cloth or cotton swab, slightly soaked in alcohol if you see contamination.
- 🔋 Carefully remove the capsule from the silicone strap, pressing on the convex part on the back side.
- 🧼 Clean the bottom of the tracker and the charger contacts of dust and moisture.
- 🔌 Make sure that USB-The charging cable connector is serviceable and has no oxides.
- 🚫 Do not try to charge the device without removing it from the strap – it is physically impossible without damage.
☑️ Preparation for charging
Installation process on charger
Charger for Xiaomi Mi Band 4 is a small plastic dock with convex contacts and USB-The main task of the user is to correctly orient the tracker relative to the docking station. There is a special notch on the charger that repeats the shape of the capsule, which makes it easier to fix. It is important not to confuse the sides, since the contacts must match mirror.
Insert the capsule into the notch of the charger so that the convex screen looks upwards and the contact pads on the bottom of the tracker fit tightly to the contacts on the dock. If done correctly, you will feel a slight snapping (USB-port of the computer or adapter on the screen of the bracelet should light up the battery indicator.
⚠️ Warning: Never put excessive effort into inserting the capsule into the charger.If the tracker doesn't get in place with a slight click, check for orientation.Forced pressure can break the dock's plastic locks.
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If the contacts are oxidized, gently rub them with a stripe – this will help restore conductivity without using chemistry.
In some cases, users are faced with a situation where the device does not respond to the connection, most often because the contacts do not touch tightly due to residues of sweat or pile, it is also worth checking whether the tracker is reversed. The correct orientation is when the screen is pointed upwards and the pulse sensor is pressed against the charging contacts.
Indication of battery status
Understanding what the symbols on the display mean will help you control the energy replenishment process. Once you successfully connect the capsule to the dock, the current percentage charge level and the lightning icon will be displayed on the screen. If the battery has been completely discharged, it may take several minutes before the screen lights up.
While charging, the zipper icon stays on the display, signaling that current is going.When the device reaches 100%, the lightning will disappear and you will see the battery scale full. Mi Smart Band 4 does not have an LED indicator on the body, so all information is only available through the battery. AMOLED-display.
| Symbol on screen | Meaning | Action. |
|---|---|---|
| Lightning +% | Charging is in progress. | Keep it to 100%. |
| 100% | Battery fully charged. | Shut off the network. |
| Red battery | Critically low charge | I need you to charge. |
| Lack of response | No contact or discharged to zero | Check contacts and cable |
Charging time and autonomy
One of the main advantages of this model is its impressive autonomy: the battery capacity is 135 mAh, which, when used in moderation, allows the device to work for up to 20 days without recharging.
It takes about 2 hours to fully charge the device from zero to 100%. That's fast enough for this class of gadgets. It's worth noting that using fast chargers from smartphones won't cut that time significantly, since the power controller in the bracelet limits the incoming current for safety.
If you use sleep monitoring and constant pulse measurements, the battery can run out faster, in about 10-12 days, in only hours and pedometer mode, the device can last up to a month, and the maximum battery capacity is achieved after 3-5 full charging and discharging cycles.
Possible problems and solutions
Sometimes users are faced with the fact that the bracelet is not charged. The first reason is often oxidation of contacts due to water or sweat. Moisture left between the capsule and charging blocks the transmission of current. Dry carefully and wipe the contact group with an alcohol napkin.
The second common problem is damage to the charging cable itself, and because the dock is lightweight and often hangs on the wire, fractures have been around regularly. USB-If nothing helps, maybe the battery or the power controller inside the capsule has failed.
- 🔍 Check if there is no green plaque or corrosion on the contacts.
- 🔌 Try connecting the charger to another USB-port.
- 🔄 Restart the bracelet by holding the touch button for a few seconds (if the screen reacts).
- 🛠 In extreme cases, perform a reset to factory settings through the Mi Fit application.
⚠️ Warning: Do not leave the device on charge for several days in a row after reaching 100%.Although the controller turns off the current, prolonged exposure to the voltage can accelerate the degradation of the lithium battery.
What to do if the bracelet warms up when charging?
Long-term service rules
To keep your Xiaomi Mi Band 4 running for a long time, it's important to follow the basic rules of lithium battery life: Don't let it go to zero on a regular basis. Try to charge when the energy level drops to 10-15%. Deep discharge is bad for battery chemistry.
Also, keep the device from extreme temperatures: Do not leave the bracelet in the sun or in the cold while charging; The optimal temperature for charging is from +10 to +35 degrees Celsius; these simple recommendations will keep the battery capacity at a high level even after a year of use.
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Regularly cleaning contacts and avoiding deep discharge are key factors in your fitness tracker’s long life.
In conclusion, the process of charging a fitness bracelet is simple, but requires care. Proper installation of the capsule and care for contacts will save you most of the problems. Follow the instructions, and your gadget will delight with accurate data and long work time.