How to properly charge the fitness bracelet Xiaomi Mi Band 4: instructions with photos and tips

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for tracking activity, despite the release of new models. Its main advantages are compactness, accurate pulsemeter and record time from one charge (up to 20 days in standby mode). However, even such a hardy device sooner or later requires recharging. If you first encounter this procedure or encounter problems (bracelet does not charge, indicator does not burn, charging takes too long), our instructions will help you understand all the nuances.

In this article, we will detail how to properly charge the Mi Band 4, which adapters and cables are suitable, how long it takes to fully charge, and give tips on battery care. Particular attention will be paid to typical user errors that can reduce battery life or even disable the bracelet. For example, did you know that using non-original chargers with a voltage above 5V can overheat the power controller of the bracelet? or that charging the gadget at temperatures below +5 ° C is strongly discouraged?

If your bracelet is out at the wrong time, or you just want to know how to make the most of its battery, read on. We've gathered all the information you need, including hidden features (like how to check your charge level without a smartphone) and ways to diagnose malfunctions.

1.What comes with the Mi Band 4 charging package

Before you start charging, make sure you have everything you need. The standard set of Xiaomi Mi Band 4 includes:

• 🔌 Magnetic-connector charging cable (pogo-pin type) that connects to any type of charger. USB-port.
• 📄 Short instructions in several languages (including Russian).
• 🎁 Cardboard box with Mi logo (in some regions may not be available).

Important: no power supply (adapter) included! This is done to save and reduce the environmental footprint. You can use a charger from a smartphone (e.g., from Redmi or Mi) with an output voltage. 5V/1A or 5V/2A. It's also good. USB-port of computer, laptop or power bank.

If you lose the original cable, don't rush to buy the first one on the market. Cheap analogues often have poor contact or incorrect polarity, which can damage the bracelet charging controller. The original cable can be ordered at official sites (Mi Store, AliExpress marked "Original") or in certified stores.

Step-by-step: how to charge Mi Band 4 correctly

The charging process is simple, but there are a few key things that will help you avoid errors.

1. Take the strap off. Carefully pull the silicone strap bracelet capsule. There's a small arrow on the body that points in the direction.
2. Connect the magnetic connector. Attach the cable to the contacts on the back of the capsule, the magnets will pull it into the right position. Make sure the contacts match (a slight click should be heard).
3. Connect to the power source. USB-The cable connector in the adapter, computer or power bank. The charge indicator will appear on the bracelet screen. ⚡).
4. Wait until it's fully charged. The time depends on the discharge level (usually 1.5-2 hours), and when the battery is 100% charged, the indicator will disappear.

If the charging indicator does not appear:

• ❌ Check if the cable fits tightly (try reconnecting).
• ❌ Make sure the power supply is working (try another one). USB-port).
• ❌ Check the contacts on the capsule and cable – they should be clean (wipe with an alcohol napkin if necessary).

Some users complain that the bracelet is charged with "tears" or shuts down after a few minutes, most often due to poor contact due to contamination or mechanical wear of the connector, in which case try to clean the contacts gently with a soft toothbrush soaked in isopropyl alcohol.

How long does the Mi Band 4 charge and how to check the battery level?

The time of full charging of the bracelet depends on several factors:

Note: using adapters with voltages higher than 5V (such as 9V or 12V) can damage the power controller of the bracelet.

To check the battery level:

1. Raise your hand – the percentage of charge will appear on the screen (if the function of Raising your hand for activation in the settings is enabled).
2. Touch the touch button below the screen and scroll through the menu to the battery icon (🔋).
3. In the Mi Fit or Zepp app (depending on the firmware), the charge level is displayed on the device’s home screen.

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If the bracelet is discharged "to zero" and does not respond to charging, hold it on the cable for 10-15 minutes - sometimes it takes time for the controller to "wake up".

4.Typical charging errors and how to avoid them

Many users are unconsciously shortening the battery life of the Mi Band 4, making common mistakes.

• 🔥 Using unoriginal cables, cheap analogues can have the wrong polarity or weak contact, which leads to overheating.
• ❄️ Charging at extreme temperatures. Optimal range: +10°C…+35°C. In cold or heat, the battery degrades faster.
• 🔌 Continuous power connection: Do not leave the bracelet on charge for more than 3-4 hours after reaching 100% - this reduces battery life.
• 💦 Moisture on contacts despite water protection 5 ATM, wet-breathlet loading.

⚠️ Warning: If the bracelet is running for less than 3-5 days after charging (in standard use), this is a sign of battery wear or firmware failure. Try resetting to factory settings via the Mi Fit app (Device Settings section). → Reset).

Another common problem is that the bracelet doesn't turn on after charging, and there are many reasons:

• Discharged to a critical level (you need to hold on charging for 15-20 minutes).
• Firmware failure (try to update the software through the application).
• Mechanical damage to the contacts (repair required).

5 How to extend the battery life of Mi Band 4

The battery in the Mi Band 4 is designed for 300-500 full charge cycles. After that, the capacity begins to decline markedly. To delay this moment as much as possible, follow these tips:

• 🔄 Avoid full discharge. Try to recharge the bracelet at 10-20% charge, rather than waiting for it to shut down.
• ☀️ Keep it cool. Do not leave it in direct sunlight or near heat sources (e.g. on a car torpedo).
• 📵 Turn off unnecessary functions. Permanent pulsemeter, notifications and screen backlights can be customized to save charge.
• 🔋 Use smart charging. Don't keep the bracelet on charge all night - turn off after reaching 100%.

In the Mi Fit application, you can optimize energy consumption:

1. Open Profile → Mi Smart Band 4 → Device settings.
2. Turn off the Permanent Pulsemeter (if you don't need 24/7).
3. Reduce the brightness of the screen to 2-3 divisions.
4. Set a short backlight interval (for example, 3 seconds).

With these settings, the bracelet will last 30-40% longer, and the battery will last several years without noticeable degradation.

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Regular battery calibration (full discharge + charge up to 100% every 2-3 months) helps to reset controller errors and prolong battery life.

6. Alternative charging methods (if there is no original cable)

If you lose or break the original cable, there are a few temporary solutions, but remember that they are only suitable for emergencies and may not be safe if used continuously.

• 🔌 Universal pogo-pin cable, sold on AliExpress or in electronics stores, it is important to choose the model with the right contacts (for Mi Band 4 - 2 magnetic pins).
• 🔧 I made a homemade adapter. You can gently solder the wires from the USB-cable to the bracelet contacts, but this requires soldering skills and is risky for the device.
• 📱 Wireless charging (modified versions only) Some craftsmen put the Qi module into the capsule, but this voids the warranty.

⚠️ Note: When using non-original cables, monitor the temperature of the bracelet. +40°C, immediately disconnect it from power! Overheating can cause the battery to bloat.

If you are buying a universal cable, pay attention to:

• Mi Band 4 is not compatible with cables for Mi Band 5/6!
• Magnets for reliable fixation.
• Customer reviews (especially the quality of the contacts)

In extreme cases, you can contact the Xiaomi service center - they provide original accessories at reasonable prices.

7. Frequent questions about charging the Mi Band 4