How to turn on Xiaomi Mi Band 3 if it is dead and not included

Xiaomi Mi Band 3

Many users face the problem of the bracelet refusing to turn on after a long period of downtime even after connecting to the charger. The reasons can vary from a simple discharge to a firmware failure. In this article, we will discuss all the working ways to resuscitate the Mi Band 3, including forced reset, resetting settings and checking the charging equipment.

If the bracelet is dead for more than a day, don't panic. The first 12 to 24 hours after full discharge is a critical period when the power controller can block charging to protect the battery, and your job is to ensure that the power is stable and the device is woken up with the right sequence of actions.

Please note that the instructions below are only suitable for original bracelets, and if you use a replica or fake, the algorithms may not work due to different electronics, in which case we recommend you contact the seller or service center.

Why is Mi Band 3 not turned on after discharge?

Full discharge of lithium-polymer battery to 0% - stressful situation for electronics. in Mi Band 3, the battery protection is responsible for the power controller BQ25895, It's a critical discharge that can block charging until the minimum voltage is restored:

• 🔋 Deep discharge: Battery voltage dropped below 2.8V, the threshold at which the controller shuts off the battery to prevent damage.
• ⚡ Faulty charger: cable with damaged contacts or insufficient current (<200(m) cannot “wake up” the controller.
• 🔄 Firmware failure: if the bracelet is discharged during the software update, damage to system files may occur.
• 💧 Contact oxidation: getting moisture or sweat on the charging contacts of the bracelet or docking station leads to poor connection.
• 🔌 Problems with USB-port: charging via a computer or uncertified adapters often gives insufficient voltage.

Fun fact: The Mi Band 3 uses a 110 mAh battery that could theoretically last up to 500 full charge cycles. However, deep discharges reduce that time by 2-3 times. If your bracelet "died" after a year of use, this is probably the problem.

Before you start resuscitation, check three key points:

1. Do you use the original Xiaomi cable (with magnetic contacts)?
2. Whether the charging contacts on the bracelet and docking station (no oxidation and dirt).
3. Do you connect charging to a network adapter (5V/1A, not to USB-port.

Preparation for resuscitation: what to do before the beginning

Before you try to turn on the bracelet, prepare the workplace and tools, and failing to do so can lead to even bigger problems, such as short circuits or damage to the power controller.

You'll need:

• 🔌 Original charging cable Mi Band 3 (with magnetic connector).
• 🔌 Network power adapter 5V/1A (from smartphone or tablet).
• 🧴 Cotton swabs and isopropyl alcohol (70% or higher) for cleaning contacts.
• ⏱ Timer (you can use your smartphone) to track charging times.
• 📱 Smartphone with Mi Fit app installed (last version).

Important: Do not use acetone, vodka or other aggressive liquids to clean the contacts, they can damage the protective coating of the board. Isopropyl alcohol evaporates without a trace and is safe for electronics.

If you don't have the original cable, you can use a compatible cable temporarily, but with the obligatory polarity.

If you connect the bracelet to a non-original power source (for example, to a power bank), make sure that it gives a stable 5V. Using adapters with a voltage of 9V or 12V (for example, from a laptop) can put the bracelet out of action forever.

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If you don't have isopropyl alcohol on hand, you can use a regular eraser to clean the contacts, and carefully rub them with metal pads on the bracelet and docking station to remove oxides.

Method 1: Forced charge (forced charge)

If the bracelet is not responding to the charger connection, try forced charging first, which works 60-70% of the time and does not require disassembling the device.

Algorithm of action:

1. Connect the bracelet to the original cable and paste it into the network adapter 5V/1And.
2. Leave the bracelet on charge for at least 30 minutes, even if the indicator is not on.
3. After 30 minutes, briefly press the button on the bracelet (1-2 seconds) and hold it pressed for 10-15 seconds.
4. If the Mi logo or charging indicator appears on the screen, release the button and continue charging for another 1-2 hours.

Critical: If the bracelet shows no signs of life after 30 minutes of charging, do not turn it off the power. The power controller may take up to 2-3 hours to restore the minimum voltage.

If the bracelet vibrates but does not turn on after holding the button, repeat the procedure again after 10 minutes. Vibration means that the controller has received enough energy to actuate, but the battery charge is still too low.

Connect to the original cable|Use the adapter 5V/1And|Wait 30 minuteless|Hold the button 10–15 seconds|Repeat at vibration-->

If this method doesn't work, move on to the next one, but first check:

• 🔌 Contact: whether they have oxidation or dirt (clean alcohol).
• 🔋 Cable: Try another original cable or docking station.
• 📱 Power adapter: connect to another source (for example, to charge from a smartphone).

Method 2: Reset settings by holding the button (hard reset)

If the bracelet vibrates when you connect to a charger but doesn't turn on, there may have been a firmware failure, in which case hardware reset will help, which erases all user data but returns the bracelet to factory settings.

Resetting instructions:

1. Turn off the bracelet from charging.
2. Press and hold the button on the bracelet for 20-25 seconds.
3. If the screen blinks or the bracelet vibrates, release the button.
4. Connect the bracelet to charging and wait for the charging indicator to appear.

After resetting, the bracelet should be turned on within 5-10 minutes.

• Repeat the procedure again, holding the button for 30 seconds.
• Try resetting your settings through the Mi Fit app (if the bracelet is determined by your smartphone).

Important: After a hard reset, you will need to re-synchronize with the Mi Fit app. All data on steps, sleep and training will be deleted.

If the bracelet is turned on after reset, but immediately switches off, this is a sign of a faulty battery, in which case the battery will need to be replaced at the service center.

Method 3: Flashing through the Mi Fit app

If the bracelet is turned on but is unstable (rebooting itself, not synchronizing), the cause may be a damaged firmware, and you can restore it through the official Mi Fit application.

Step-by-step:

1. Install the latest version of Mi Fit from Google Play or App Store.
2. Connect the bracelet to charge and wait until it charges to at least 10%.
3. Launch Mi Fit and go to the Profile section → Mi Smart Band 3.
4. Click on the three dots in the upper right corner and select Update firmware.
5. Follow the instructions on the screen. Don't turn off the bracelet from charging until the process is complete.

The firmware takes 5-15 minutes depending on the version, and after the upgrade, the bracelet will reboot automatically.

If there is no update button in the app, try:

• 🔄 Untie and re-tire the bracelet in Mi Fit.
• 📱 Reinstall the application.
• 🌐 Connect to another Wi-Fi network (sometimes updates are blocked on corporate or public networks).

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Flashing through Mi Fit is the safest way to repair the bracelet, but if the firmware is critically damaged, you may need to use third-party utilities (such as Notify & Fitness or Mi Bandage).

Method 4: Checking the battery and contacts (for advanced ones)

If none of the previous methods worked, the problem may be physical damage to the battery or contacts, which would require disassembly of the bracelet.

What you can do on your own:

• 🔧 Carefully disassemble the bracelet using a plastic spatula (not metal!).
• 🔍 Check the integrity of the battery plumes and contacts.
• 📏 Measure the voltage on the battery with a multimeter. If it is below 3.0V, the battery needs to be replaced.
• 🧴 Clean the contacts of the battery and board with alcohol.

If you do not have experience in electronics repair, it is better to contact the service center. The cost of replacing the battery in the Mi Band 3 is 800-1500 rubles (depending on the region).

Disassembly warnings:

⚠️ Warning: Do not use a hair dryer or other heating appliances to remove the cover.This can deform the body and damage the display.

⚠️ Warning: The battery in the Mi Band 3 is soldered to the board. You can't take it off by force, it can damage the tracks.

If you are planning to do this, here is a brief instruction:

1. Remove the strap and find two latches on the back of the body.
2. Carefully tuck the lid with a plastic spatula, starting from the side of the button.
3. Disconnect the display plume (it is attached to the latch).
4. Check the battery for swelling or leakage of the electrolyte.

What do you do if nothing helps?

If all of these methods have failed, there are three options:

1. Official centers Xiaomi is in most major cities, the cost of diagnosis — from 500 rubles.
2. Buy a new battery and replace it yourself. The price of the original battery is about 600-800 rubles.
3. The Mi Band 3 is still sold in some stores, but it’s better to consider newer models (Mi Band 6 or Mi Band 7).

Before you deactivate the bracelet, try another method, which is to "overclock" the battery, and sometimes the power controller blocks charging because the voltage is too low and you have to "cheat" it:

• Connect the bracelet to charging through USB-externally powered hub (for example, from a router).
• Leave on charging for 12-24 hours.
• Periodically (every 2-3 hours) press the button for 5-10 seconds.

This method works in 10-15% of cases when the controller is “hang” in protected mode.

If you decide to buy a new bracelet, pay attention to models with improved protection against deep discharge:

How to avoid re-discharge: 5 rules of care for Mi Band 3

To make the bracelet last longer, follow these recommendations:

• 🔋 Charge regularly. Keep the discharge below 10%. Optimal range is 20 to 80%.
• ⚡ Use the original cable. Unoriginal charges can damage the power controller.
• 💦 Avoid moisture, despite what you're told. IP68, Prolonged exposure to water or sweat leads to oxidation of contacts.
• 🔄 Update your firmware. Newer versions often fix power management errors.
• 🌡 Store at room temperature. Extreme cold (<0°C) or heat (>40°C) reduce battery life.

It is also useful to calibrate the battery once every 2-3 months:

1. Discharge the bracelet to 0% (until it turns off).
2. Charge to 100% without interruption.
3. Turn off the charging and let work 2-3 hours.
4. Repeat the charging-discharge cycle again.

This procedure helps the power controller to determine the level of charge more accurately.

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The average battery life in the Mi Band 3 is 2-3 years, and then the capacity drops by 30 to 50 percent, and the bracelet needs to be recharged more often, and if the battery holds a charge for less than a day, it's time to change it.

FAQ: Frequent questions about Mi Band resuscitation 3