How to charge the Xiaomi Mi Band 4 fitness bracelet: full instructions with battery tips

Why Firing the Mi Band 4 Is Important for Durability

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for tracking activity due to its combination of functionality and affordable price. However, many users face problems with fast battery discharge or improper charging, unaware that the reason is often the wrong way to handle the device. The Mi Band 4 battery has a limited resource of charging cycles (about 300-500), and each incorrect approach reduces its life.

In this article, we will not only discuss basic charging instructions, but also the nuances that the manufacturer does not say: how to choose the original charger, what to do if the bracelet does not charge, and how to extend the life of the battery without losing capacity.

If your Mi Band 4 is running out in a day or refuses to turn on after you're connected to a charger, you'll find proven solutions here, from cleaning contacts to resetting. And for those who just bought a device, we've prepared a checklist for the first connection to avoid common problems from the start.

Set and original charger: how not to run into a fake

In the Xiaomi Mi Band 4 box, you'll find the bracelet itself, the capsule with the display, and the proprietary charger with the magnetic connector, which is often lost or fails, and users buy a replacement on the market, and that's where the problems begin: about 60 percent of the "original" charges on AliExpress or Amazon are low-quality fakes that can damage the battery.

How to distinguish the original from the copy:

• 🔍 Marking: The original cable has a Xiaomi logo, serial number, and the inscription "Made in China" (fakes often print crooked or error-proof).
• 🧲 Magnet: In the original, the magnet firmly fixes the bracelet, and in copies it is weak - the capsule can detach at the slightest movement.
• 🔌 Contacts: Brand-name charging contacts are gold-colored, smooth and without traces of oxidation. Counterfeit products often have dull metal or uneven edges.
• 📦 Packaging: The original is sold in a white box with a hologram of Xiaomi and a barcode, which can be checked on the manufacturer's website.

If you have already bought a non-original charger, use it only as a last resort - such devices can supply unstable voltage (above 5V), which leads to overheating of the battery and reduce its life by 30-40%.

⚠️ Warning: Never use chargers from other Mi Band models (e.g. Mi Band 3 or 5) Despite the similarities, they have different current strengths and this can cause the power controller to fail.

Step-by-step: how to charge Xiaomi Mi Band 4 from scratch

The charging process seems intuitive, but many users miss key points that make the bracelet charge longer or not recognized by the system.

1. Remove the capsule from the strap. Press the button on the back of the bracelet and pull the capsule upwards. Don't put too much effort into it, the fixing mechanism is fragile.
2. Connect the charger to the power source (USB-computer port, adapter 5V/1Or power bank. Mi Band. 4 It does not support fast charging, so powerful adapters (for example, from smartphones) will not give you the advantage.
3. Attach the capsule to the charger. The magnetic connector should "pull" with a characteristic click. If this does not happen, check the purity of the contacts (see section below).
4. Wait for the indicator to come up. The battery icon will show up on the bracelet screen with charging animation. If the indicator doesn't burn, try reconnecting the cable or using another one. USB-port.
5. Charging to 100% takes about 1.5-2 hours. Do not interrupt the process, even if the bracelet shows 90% - the last 10% is critical for calibrating the power controller.

After full charge, disconnect the bracelet from power. Don't leave it on the "reserve" charge - this leads to recharge and battery degradation. The optimal level for disconnection is 95-100%.

How long does Mi Band 4 take to charge and how to speed up the process?

The charging time of Xiaomi Mi Band 4 depends on several factors: battery status, cable quality and power source. The table below shows the average values for different scenarios:

To speed up charging:

• ⚡ Use the exit adapter 5V/1And (like Xiaomi Redmi smartphones) powerful adapters (2And+) No speed gain due to bracelet controller limitations.
• 🔋 Turn off sync with Mi Fit while charging. Constant data transfer via Bluetooth increases time by 10-15%.
• 🌡️ Charge at room temperature (15–25)°C) Cold or heat slows down the chemical processes in the battery.

⚠️ Warning: If the bracelet is charging for longer than 3 hours, it is a sign of a malfunction of the battery or power controller. In this case, try resetting to the factory settings (Settings) → Reset in the Mi Fit app) or contact the service.

Typical problems and their solutions: bracelet does not charge or discharges quickly

Even when properly operated, Mi Band 4 users face power-related problems, and consider the most common cases and ways to address them:

1.The bracelet does not respond to charging

If the indicator does not light up after connecting to the cable:

• 🔌 Check the cable and the power supply. Try another one. USB-port.
• 🧹 Clean the contacts on the capsule and charger with a cotton swab dipped in alcohol.Oxidation or dirt can block the connection.
• 🔄 Reset the bracelet: Hold the button on the capsule for 10 seconds until the Mi logo appears.
• 📱 Update your firmware through the Mi Fit app. Sometimes software bugs block charging.

2. Fast battery discharge

If the bracelet discharges in 1-2 days instead of the promised 20:

• 📵 Turn off constant sync with Mi Fit. Just update the data 1-2 times a day.
• 🌙 Activate Battery Savings mode in bracelet settings (disables backlighting and notifications).
• 🔍 Check background processes. Some applications (like Google Fit) may conflict with Mi Fit and consume power.
• 🔋 Replace the battery. After 2-3 years of operation, the capacity drops by 30-50%. In the Xiaomi service, the battery for the Mi Band 4 costs about 800-1200 rubles.

3.The bracelet heats up during charging

Light heat is normal, but if the capsule gets hot:

• ❄️ Turn off the charging immediately and let the bracelet cool down.
• 🔌 Check the cable for damage. Counterfeiting often causes overheating.
• 📉 Use a power supply with a current not higher than 1A. Powerful adapters (2A)+) They can overload the controller.

How to extend the battery life: expert advice

The Mi Band 4 battery is lithium-polymer and degradation is inevitable, but proper maintenance can increase lifespan by 30-50%.

• 🔋 Avoid full discharge. Recharge the bracelet at 10-20% charge. Deep discharges (below 5%) reduce battery life.
• 🌡️ Store at optimum temperature. Ideal range 10 to 30°C. Storage in the cold or in direct sunlight accelerates degradation.
• 📵 Turn off unnecessary features. Permanent Bluetooth, backlighting and notifications eat up to 30 percent of the charge per day.
• 🔄 Calibrate the battery every 2-3 months: completely discharge the bracelet, then charge to 100% without interruptions.

If you don’t use the bracelet for a long time (for example, in winter), store it with a charge of 40-60% in a dry place.

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Before long-term storage (for example, on vacation), wrap the Mi Band 4 capsule in foil - this blocks random button presses and battery discharge.

Frequent questions about charging Xiaomi Mi Band 4

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Use only original accessories and avoid extreme temperatures – these are two key factors that determine the longevity of the Mi Band 4 battery by 60%.