Why Xiaomi bracelet is not charged: all the reasons and ways of solving

Xiaomi Mi Band fitness bracelets (including models from Mi Band 3 to Mi Band 8 and Smart Band Pro) have become an integral part of the daily lives of millions of users. But even the most reliable technology can fail — and one of the most common problems is that the bracelet has stopped charging. The situation is familiar to many: you connect the device to charging, the indicator does not burn, the battery percentage does not increase, or the gadget does not respond to the cable at all.

In this article, we will discuss all possible reasons why the Xiaomi Mi Band does not charge - from banal (demagnetized contacts) to serious (damage to the power controller).You will learn how to diagnose the problem yourself, which manipulations are worth trying at home, and in which cases it is better to contact the service.

Important: if your Xiaomi bracelet not only does not charge, but also does not turn on, overheats or gives errors when connecting, this may indicate a complex malfunction. In such cases, we recommend first checking the simplest solutions (cleaning contacts, changing the cable), and then proceed to a deep diagnosis.

1. Problems with charging cable or adapter

To start with, the most obvious is that 60 percent of the time the Mi Band doesn't charge is due to a faulty cable, adapter or socket, and the wire can look whole, and the problem lies inside, like a cliff of thin veins or oxidation of contacts.

How to check:

• 🔌 Connect the cable to another USB-If the bracelet starts charging, the problem is in the original power supply.
• 🔍 Check the cable for damage: bending at the base, bare wires, traces of melting, especially the spot near the USB-Type-A connector.
• 📱 Try charging another gadget with the same cable (e.g. headphones or power bank) if it doesn't charge, the cable is faulty.
• ⚡ Use the original adapter from Xiaomi (5V/1A). Powerful power supplies (for example, from a tablet) can work the protection of the bracelet.

Please note: Mi Band models 4/5/6 The charging cable has magnetic contacts that demagnetize over time, and if the bracelet falls off the charge at the slightest movement, that's a sure sign of wear and tear. ~300–500 ruble).

⚠️ Warning: Never use a higher output adapter to charge the Mi Band 5V (It could be from laptops or fast charging of smartphones, and it could knock out the power controller of the bracelet.

2. Contamination or oxidation of contacts

The charging contacts on the bracelet and cable are the weak spot of all Mi Bands, which eventually become dusty, oxidized, or even deformed, especially for users who wear the bracelet. 24/7 (including shower, gym, pools).

Signs of contaminated contacts:

• 🔋 The bracelet is charged only in a certain position (for example, if you press the cable with your hand).
• ⚡ The charging indicator flashes or periodically fades out.
• 💦 On the contacts visible white plaque (oxidation) or black dots (corrosion).

How to clean contacts:

1. Disconnect the bracelet from the strap (gently dent the latches with a plastic card).
2. Moisten the cotton swab in isopropyl alcohol (or vodka) and wipe the contacts on the bracelet and cable.
3. For severe contaminants, use an eraser (greatly rub the contacts to remove oxides).
4. Allow the device to dry for 10-15 minutes before connecting.

Unplug the strap|Drinking contacts with alcohol|Remove oxides with erasing|Dry for 15 minutes.|Check the charging.-->

If the contacts are deformed (e.g. bent), they can be carefully aligned with a thin screwdriver, but beware - excessive pressure can damage the board.

3. Software failures

Sometimes Xiaomi bracelet fails to charge due to software errors, not physical malfunctions.

• 📱 Failed firmware update via Mi Fitness.
• 🔄 Excessive shutdown during charging (for example, if the cable is pulled out).
• 🛠️ Resetting settings through the application.

How to fix it:

1. Hard reset: Connect the bracelet to charging. Press and hold the touch button (under the screen) for 10-15 seconds until the Mi logo appears. Release the button and wait for the reboot.
2. Update to the firmware via Mi Fitness: Open the app → Profile → Mi Smart Band → Update the firmware. If a new version is available, install it.
3. Reconnect the bracelet: In Mi Fitness, remove the device (Profile) → Mi Smart Band → Remove the device. Reboot the smartphone and the bracelet. Reconnect the bracelet through Add the device.

If the bracelet is turned on after reset, but does not charge, it is more likely a hardware problem, and if it does not react at all (does not vibrate, does not show the logo), the motherboard may be damaged.

4. Battery malfunction

The average battery life in the Mi Band is 2-3 years (or ~500 charge cycles. After that, the capacity drops, and the bracelet can:

• 🔋 Do not hold the charge (discharged in a few hours).
• ⚡ Do not charge to 100% (for example, stops at 80%).
• 🚫 Do not react to charging (if the battery is completely degraded).

How to check the status of the battery:

Replacing the battery in the Mi Band is almost impossible on its own - it is soldered to the board, and the body is glued together. 800 Cost of new battery for Mi Band 6/7 — near 500–700 ruble.

⚠️ Warning: If the bracelet is heated during charging (temperature above 40)°C, immediately disable it! This is a sign of a short circuit in the battery, which may cause a fire!

5. Damage to the power controller

The power controller is a chip on the bracelet board that regulates the battery charge, and if it fails, the bracelet can:

• 🔌 Do not respond to charging (even if the cable and battery are in good condition).
• ⚡ Charge very slowly (e.g. 1% per hour).
• 💥 Cyclically disconnect when connected to USB.

Causes of Controller Failure:

• ⚡ Voltage surges (for example, if charged from an unstable socket).
• 💦 Moisture intrusion (even if the bracelet is waterproof, condensate can damage the chip).
• 🔥 Overheating (if left in the sun or near a heat source).

It's impossible to diagnose a controller malfunction at home, because it requires a multimeter and electronics experience, and if all previous methods have failed and the bracelet shows no signs of life, it's likely that the controller is the problem.

Cost of repair in the service:

• Mi Band 3/4/5: 1000–1500 ruble (replacement of payment).
• Mi Band 6/7/8: 1500–2500 RUB (due to more complex design).

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If the bracelet stopped charging after a fall or impact, most likely, the board is damaged or the contacts soldered off, in this case, repair will cost less than replacing the controller (about 500-800 rubles).

6. Problems with strap or body

But if you don't build the strap properly or deform the body, you can make the bracelet contacts in contact with the charging.

• 🆕 New bracelets (if the strap is installed curved from the factory).
• 🔄 Bracelets after the belt replacement (for example, silicone from a third-party manufacturer).
• 💥 Devices after impact (if the body is deformed).

How to check:

1. Remove the strap and inspect the grooves of the mounting - they should be symmetrical.
2. Try to squeeze the bracelet body carefully from the sides, so if the contacts are "sinking," the board may have shifted inside.
3. Install the strap again, making sure that it fits tightly to the body.

If the body of the bracelet cracked (for example, after falling), moisture or dust could get inside, which led to corrosion of the contacts, in which case only replacing the case (in the service) will help. ~600–1000 rubles).

7.Problems with the Mi Fitness app

Rarely, Xiaomi bracelets fail to charge due to malfunctions in the Mi Fitness app (formerly Mi Fit).

• 📱 The application “hangs” at the synchronization stage and blocks charging.
• 🔄 After the update Mi Fitness bracelet is no longer defined.
• 🚫 The settings include an energy saving mode that limits charging.

How to fix it:

1. Reinstall the app: Remove Mi Fitness via Settings → Download the latest version from Google Play or the App Store. Register again and plug in the bracelet.
2. Turn off energy saving: On Android: Settings → Battery → Energy conservation → Exceptions → Mi Fitness. On iOS: Settings → Battery. → Mi Fitness → Disable "Battery optimization".
3. Reset the app cache: Android: Settings → Annexes → Mi Fitness → Memory. → Clear the cache.

If the bracelet doesn't charge after this manipulation, it's not the software, but it's worth checking if the device is detected in the application, and if it is, it's connected, and the problem is in the hardware.

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Before reinstalling Mi Fitness, save your activity data to the cloud (Profile) → Settings → Backup, otherwise the training history will be lost.

8. When do you contact the service?

If you’ve tried all the methods in this article and the Xiaomi bracelet is still not charging, it’s time to contact the specialists.

• 🔥 The bracelet heats up when connected to charging.
• 💧 On the board or battery visible traces of corrosion or moisture.
• 🔌 The stains are broken or stained (see below).
• 🚫 The bracelet does not turn on even after a hard reset.
• ⚡ Charging is ongoing, but the percentage is not increasing (controller defect).

Where to fix:

• 🛠️ Xiaomi service centers (warranty is maintained, but repairs may take 1-2 weeks).
• 🔧 Local workshops (faster and cheaper, but without warranty).
• 📦 Self-replacement (only if you have experience of soldering) SMD-component).

The cost of repairs in 2026:

If the cost of repair exceeds 50% of the price of a new bracelet (for example, for the Mi Band 8, it is the same as the price of the new bracelet). ~3000 rubles), it is more expedient to buy a new device, especially since new models come out every year with improved sensors and battery.

FAQ: Frequent questions