How to charge Xiaomi Mi Band 4: the full guide

Owners of the popular activity tracker often face the need to restore the charge of the device, but the process of powering the Xiaomi Mi Smart Band 4 has its nuances. Unlike modern models that use magnetic charging, the fourth version of the bracelet requires connection through special contacts on the capsule body. Improper handling of the port or using an unoriginal cable can lead to oxidation of contacts or even the gadget fails.

The average device life is 10 to 20 days depending on the activity of notifications and the monitoring functions on. However, when the battery is down, it is important to know how to quickly and safely bring the tracker back to life. The power controller in this model is quite sensitive to voltage surges, so the use of quality energy sources is a prerequisite for the long service of the gadget.

In this guide, we will take a look at all the steps of connecting to the network, explain the meaning of light indicators and answer questions users have when first charging, learn why the bracelet may not respond to connection and how to extend the life of a lithium polymer battery with a capacity of 135 mAh.

Preparation for charging and necessary accessories

Before you start the process, make sure you have the original charging cable that came with the device. USB-The use of third-party cables, even if they are physically fit, can lead to improper current supply.

You'll also need a power source. USB-It is important that the power supply delivers a standard 5 volts. Using powerful Quick Charge, Power Delivery units for the Mi Band 4 is not recommended, as the controller may not properly process high incoming current.

Visually inspect the contacts on the bracelet itself and on the cable, which should be free of dirt, dust or traces of oxidation, which often appear due to sweat or water intake. If you notice contamination, gently wipe them with a dry soft cloth or cotton swab, slightly soaked in alcohol.

• 🔌 Original charging cable from the supply kit
• 🔋 Correct. USB-power-port 5V/1And
• 🧼 Dry fabric or alcohol to clean contacts
• 📱 Smartphone with Mi Fit app installed (to control status)

Step-by-step instructions for connecting to the network

The charging process of the Mi Smart Band 4 requires care, as the contacts are located on the inside of the body and have a small touch area. First, remove the tracker from the silicone strap. This is done by pressing on the convex part of the capsule on the back side, after which it easily slips out of the hole.

Insert the capsule into the charger. Pay attention to the location of the contacts: the convex pins on the charger should fit tightly to the metal pads on the bracelet. If the connection is done correctly, the device vibrates slightly, and the battery icon lights up on the screen.

If the screen doesn't catch fire, try changing the pod position slightly or rubbing the contacts again. Sometimes it takes a little effort to penetrate the oxide layer, but act carefully so as not to damage the plastic guides.

Status indication and charging time

Understanding the signals that the device sends helps to avoid panic and correctly assess the state of the battery.

Full charging of the fully discharged Xiaomi Mi Band 4 takes about 1.5-2 hours. you should not keep the device on charge for days after reaching 100%, although modern controllers cut off the current, it is an extra load on the chemical elements of the battery.

The table below shows the main states of the indicator during the process:

Typical problems and ways to solve them

Often, users are faced with a situation where the bracelet does not respond to the connection, and in most cases, the problem lies in contamination of the contacts with sweat or cream that accumulates in the recesses of the case, and careful cleaning with alcohol solves 90% of these cases.

Another reason could be a deep discharge, because if the device was idle for several months, the battery could go into sleep mode, so leave the bracelet on charge for 15 to 20 minutes, even if the screen does not light up immediately, sometimes it takes time to rock the battery cells.

⚠️ Warning: If the bracelet is very hot during charging, immediately disconnect it from the mains.Heating the case indicates a malfunction of the battery or power controller, which can be dangerous.

Also check the integrity of the charging cable itself. Thin wires are often broken at the base. USB-Try to bend the cable slightly in different places when you connect, if the charging appears, then it disappears, the cable will have to be replaced.

Contact care and battery life extension

To make the Mi Smart Band 4 last, it is important to follow the rules of operation. After each reading or workout, especially if you are sweating, wipe the back of the device with a dry cloth.

Don't let the device run completely at zero on a regular basis. Lithium polymer batteries are best served with a charge of 20% to 80%. Try to put the tracker on charge when there is about 15-20% of power left, without waiting for a full shutdown.

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Store the bracelet in a dry place at room temperature. If you don't plan to use the device for a long time, charge it to 50-60% and turn it off. Check the charge every 3 months.

Regularly update your firmware through the Mi Fit app (or Xiaomi Wear). Xiaomi engineers often release optimizations that improve power-management algorithms, which indirectly affects charging modes.

Frequently Asked Questions (FAQ)

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Timely cleaning of contacts from sweat and dirt is the main secret of fast and safe charging of your fitness bracelet.