The situation when the loved ones TWS-And the headphones suddenly refuse to take charge, which is familiar to many owners of the Xiaomi ecosystem, and it always happens at the most inopportune moment, before an important meeting or at the beginning of a long trip. In 80% of cases, the problem lies not in a fatal battery failure, but in the banal oxidation of contacts or a software failure of the power controller.
In this detailed guide, we will look at all possible scenarios, from simple user errors to complex hardware malfunctions, learn how to conduct basic diagnostics with your own hands and understand when it is time to carry a device to the service and when it is enough to simply clean the connector.
Before we get to the tricky manipulations, let's get to the physics of the process. Inductive charging or charging through contacts requires the perfect connection. Even a microscopic speck of dust or a drop of sweat can break the circuit. Next, we'll look at the action algorithms for different models, including the popular Mi True Wireless Earbuds Basic and the flagship Xiaomi Buds 4 Pro.
Primary Diagnosis and External Factors
The first step is always to eliminate external factors. Often users blame the headset itself, forgetting to check the power source. If you use a powerful power supply from a smartphone that supports fast charging Quick Charge or SuperCharge, the headphone controller can block the current for security. Modern security protocols are not always correctly "friend" with each other.
Try to replace it. USB-Even if it looks whole, the conductor may have broken inside, and check the charging port itself for pile or oxidation. In Type-C models, the problem is often that the plug doesn't go in completely because of compressed dust.
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Use a cable kit or a quality analog with a current of no more than 1A (5V/1A). Powerful power supplies can "scare" low-power electronics headphones.
Temperature is another critical factor: Lithium polymer batteries installed in Xiaomi devices have built-in charge protection at extreme temperatures. If you bring your headphones out of the cold or leave them in the sun, the controller will not let the process start until the temperature stabilizes to room temperature.
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In 9 out of 10 cases, the problem is solved by replacing the cable or using a less powerful power supply (for example, from an old smartphone or a new one). USB-port).
Problems with charging case and contacts
The most common reason Xiaomi earphones don't charge is because they're contaminated in the contact areas, and when you use the gold contacts on the headphones and inside the case, you get skin fat, sweat and dust, and over time, this forms a dielectric film that generates current.
To clean, you'll need a cotton swab and some isopropyl alcohol. Carefully, without pressing too hard, wipe the contacts. Pay attention to the spring-loaded pins inside the case: they must walk freely (freely) and not be indented. If the pin is stuck at the bottom, the chain will not close.
⚠️ Warning: Never use water or aggressive solvents (acetone, gasoline) to clean contacts.The water will cause corrosion, and the chemistry can melt plastic or damage the insulation of wires inside the case.
Sometimes the problem is that the earphone just doesn't make it to the contacts because of the wrong fit. Check if there's any foreign objects inside the case or a factory molding defect that interferes with the tight fit. In models like Redmi AirDots, the magnets sometimes weaken and the earpiece dangles.
Program failure and need for resetting
Electronics are complex, and sometimes a battery management microcontroller (BMS) can go into a sleep or freeze, in which case the device is physically sound but logically unresponsive to the network connection.
The reset process varies from model to model, usually by holding the touch zones on the headphones themselves or the buttons on the case for a period of time. 15-30 In some cases, you need to put your headphones in the case, open the lid and press the pairing button until the indicator flashes in red.
☑️ The algorithm of a complete reset (Hard Reset)
Once reset, pairing with the phone again, removing the old device from the Bluetooth list ("Forget the device"), clears the cache of connections and often resuscitates "dead" gadgets.
The Secret Method for Mi True Wireless Earbuds Basic 2
Diagnostics through indication and application
Modern models like Xiaomi Buds 3T Pro or FlipBuds Pro can communicate with your smartphone via the Xiaomi Earbuds or Mi Home app. Connect your headphones to your phone and check the status of charge. If the app shows 0% and does not change after an hour of charging, or shows a “charge error”, this indicates a deep discharge or death of the battery.
Notice how the LED lights behave: normally, they should burn red (or orange) when charging and go out or change to green/white when fully charged. If the light flashes red at a certain frequency, that's an error code.
| Behavior of the indicator | Probable cause | Action. |
|---|---|---|
| Doesn't burn at all. | Case discharged, contact oxidation | Charge the case separately, clean the contacts |
| Flashes red (often) | Battery error or overheating | Refrigerate the device, perform the reset |
| Burning white all the time | The headphone is already charged or a controller error | Discharge to zero, then charge. |
| Flashes white/red | Conjugation mode or critical error | Reconnect to Bluetooth |
It's important to distinguish between the case and the headphones inside the case, and often the case shows that it's charged, but the headphones don't transmit current because of the internal breakdown of the power distribution board.
Deep battery discharge
If you TWS-Headphones have been left unused for months, and the voltage on the batteries may have dropped below a critical threshold (usually below 2.5V), in which case the standard charge controller “cannot see” the battery and blocks the current supply, considering the battery to be faulty.
There's a way to pump the battery, and leave the headphones in the case connected to the charger for a long time, 3 to 12 hours, and sometimes a low current breaks through the protection and triggers a chemical reaction inside the cell, but it's not a sure thing.
⚠️ Warning: If the lights don't catch fire after 12 hours of charging, it's likely that the battery has gone into deep chemical sleep or degraded.
For models with non-removable batteries, a deep discharge is often a sentence, since replacing the element requires soldering and microscopic assembly skills, in which cases it is easier to purchase a new kit if the warranty has already expired.
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Keep your headphones around 60-70% charge if you don’t plan on using them for a long time, which minimizes the risk of deep discharge.
Hardware malfunctions and repairs
When software and cleaning don't work, it's hardware. Inside the case, there's a control board that can fail because of a power surge (if charged from a bad socket) or moisture, and the headphones themselves could have left the speaker plume or battery.
Xiaomi models with wireless case charging often fail the receiving coil, and you can check this by trying to charge the case with a wire. If the wire is charging, but the air is not, the wireless charging module is a problem.
Repairing such compact devices is only economically feasible for expensive flagship models, and for low-end versions like the Redmi Buds, the cost of soldering the battery often exceeds the cost of a new device.
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Self-disassembly almost always leads to loss of leakage and damage to plastic latches. If the device is warranted, take it to an authorized center.