A situation where your favorite track can not be started due to discharged TWS-It always takes you by surprise, and if you find that the light on the case doesn't light up when you plug in the cable, or the percentage of charge in the smartphone doesn't rise, you're too scared. Most often, the problem lies in the banal contamination of contacts or software failure, which is easy to fix yourself.
However, the lack of response to charging cannot be ignored, as a deep discharge of a lithium-ion battery can lead to irreversible consequences. In this article, we will examine all possible causes of malfunction, from simple mechanical problems to complex hardware failure of the power controller.
Before you bring your device to the service center, you need to do a comprehensive diagnostic, and often the critical factor is the oxidation of contacts due to moisture or sweat, which occurs in 80% of user requests, and we have prepared a step-by-step algorithm that will help bring Xiaomi Earbuds back to life without unnecessary costs.
Primary diagnostics and completeness check
The first thing you need to do is eliminate external factors that are not related to the device itself. Often users sin on the device, using a poor-quality cable or power supply that does not give enough current. Try replacing the USB-C or Lightning wire with a known serviceable analogue, preferably original.
It's also worth checking the charging port itself for dust, pile, or oxidation, and using a flashlight to visually inspect the connector inside the case, and if you can see debris inside, carefully removing it can instantly solve the problem.
- 🔌 Check the integrity of the charging cable and the absence of clogs.
- 🔋 Use a power supply unit with at least 5V/1A or 5V/2And.
- 💡 Make sure the socket is working and the current is coming to the cable.
Sometimes the problem is the software display of the charge on your smartphone, try connecting the case to another power source, such as a computer or a power bank, and if the LED on the case does catch fire (even in a different color), then the charge circuit is intact, and it may be the software of the phone.
Mechanical cleaning of contact areas
The most common reason for failure to charge is a violation of the contact between the pins on the headphones and the response pins inside the case, which accumulates skin fat, dust and oxide film during operation on metal surfaces, creating high resistance.
To clean, you'll need a cotton swab and isopropyl alcohol (or alcohol-containing electronics liquid). Wet the stick, squeeze it slightly, and gently wipe the contacts inside the recesses of the case. Don't pour the liquid directly into the case!
⚠️ Note: It is strictly forbidden to use metal objects (needles, pins) to clean contacts, as you can close the chain or damage the spring mechanism.
After treatment with alcohol, allow the device to dry for 5-10 minutes. Then insert the headphones into the case and check if they have started charging. Often after this procedure, the indicator lights up, confirming the restoration of the connection.
☑️ Checklist for contact cleaning
Resetting settings and reconnecting headphones
If mechanical cleaning didn't work, there may have been a software failure of the battery control controller, in which case the device freezes and stops seeing the power connected, and the solution is to perform a full reset.
The reset procedure varies between Mi True Wireless and Redmi Buds models. You usually need to put the headphones in the case, open the lid and press the function button on the case for 10-15 seconds before changing the color of the indicator. If the buttons are not, the touch zones on the headphones themselves are clamped.
Reset combinations for popular models
After reset, remove the device from the Bluetooth list on the phone ("Forget the device") and pair again. This action calibrates the connection and can start the charging process if it was blocked software.
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Resetting to factory settings often eliminates charge controller errors that are not visible to the user.
Activation of the battery after deep discharge
If the headphones were lying idle for a long time, the battery could go into a deep discharge, in which the voltage on the cell drops below the threshold at which a standard charger "sees" the battery and starts to supply current.
To “swing” the battery, leave the case connected to the power source for a long time – from 2 to 4 hours, even if the indicator is not on.
There is a method of “pulse charging”: connect the cable to the 10-15 Then turn it off for a minute and repeat the cycle. 5-7 This can help push the chemistry of the battery, but it doesn't work with all controller models.
- ⏳ Leave the case on the charger on 3-4 half-hour.
- ⚡ Use the port. USB 2.0 on a computer (there is weaker current, but more stable voltage).
- 🔄 Try short-term cycles of connecting and disconnecting the cable.
It is worth remembering that deep discharge is harmful to the lithium polymer batteries used in Xiaomi. After successful activation, try to avoid total depletion of charge in the future.
Hardware malfunctions and payment diagnostics
When software and cleaning are powerless, it's about physical damage to the components. Inside the case is a control board (BMS) that controls charging, and when moisture falls or hits, the fuse or capacitor may have burned.
Notice how the LED behaves, if it flashes red when you connect the cable, it often indicates battery error or overheating. The constant blinking of white can indicate a short circuit in the headphone circuit.
| Symptoms. | Probable cause | Difficulty of repair |
|---|---|---|
| The indicator is not on. | Chain break, AKB case death | Tall. |
| Blinks red. | Battery error, overheating | Medium |
| It burns, but it doesn't charge. | Capacity wear, oxidation | Low. |
| Sparkling when connected | Short circuit of the fee | Critical |
Self-repairing the board requires soldering skills and a multimeter, and if you don't have these skills, further disassembly can lead to a final breakdown of the device.
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When buying used headphones, always check the case: it fails more often than the headphones themselves, due to constant charging cycles.
When professional repairs are needed
If none of the above methods worked, it is likely that the battery inside the case or the charge controller failed.Replacing the battery in the case is a difficult process, since it is often glued or soldered, and finding an original replacement is difficult.
The cost of repairs at a service center can be up to 70% of the price of a new device, and for entry-level models such as the Redmi AirDots, it is more cost-effective to buy a new kit.
⚠️ Warning: Do not attempt to open the sealed lithium battery case with sharp objects. Damage to the cell shell can cause ignition or chemical burn. If the device is guaranteed, any autopsy trace will deprive you of the right to free repair. Contact a Xiaomi Authorized Center for Diagnostics. Frequently Asked Questions (FAQ) Why does the case take a very long time to charge? It can be a sign of battery wear or a weak power supply. It can also be a sign of ambient temperature: in cold, charging is slower. Can you charge the case from wireless charging? Only if your Xiaomi model specification explicitly includes Qi support. Most budget models are devoid of this feature, and trying to charge them on the platform will not do anything? Most likely, the contacts of the headphones themselves or the pin contacts inside the recesses are contaminated. It is also possible to fail the controller inside one of the headphones. How much does the average battery live in a Xiaomi case? With active use, the resource is about 300-500 full charge cycles, which is approximately equal to 1.5-2 years of operation before the capacity drops markedly.