The situation when you take a case Xiaomi Mi True Wireless Earbuds or Redmi Buds, and the indicator does not light up, familiar to many users. The lack of charging current can be caused by banal oxidation of contacts or more complex software failure of the power controller, in most cases, the problem is solved at home without going to the service center, if you act consistently and carefully.
The first step should always be to make a primary diagnosis that eliminates the most obvious causes, such as a discharged cable or a non-working outlet. Often users forget that micro-USB or Type-C connectors tend to get clogged with dust, which blocks the power supply. Below we will discuss in detail all the steps to restore the health of your device.
It is important to understand that ignoring the problem can lead to a deep discharge of the lithium polymer battery, after which it will be almost impossible to restore it, so if you notice that the case is gaining capacity for a long time or the headphones inside do not respond to installation in the sockets, you should immediately start checking.
Primary diagnostics and inspection of components
Before you can blame the headphones or the charging box, you have to rule out external factors. The most common scenario is that the charging cable is damaged. Even if the wire is intact, the conductor could bend inside, especially around the plug. Try replacing the cable with a known working one and connect it to another power source, such as a computer or other adapter.
The second important thing is the state of the power adapter itself. Modern smartphone power supplies often have a fast-charging function that can work incorrectly with low-power devices like headphone cases. Current strength should be stable, so you better use a standard one. USB-port or old adapter with output 5V/1And.
- 🔌 Check the cable for cavities and inflections, try another wire.
- 🔌 Use a different power supply or USB-port of the laptop to eliminate problems with the outlet.
- 🔌 Make sure the indicator on the case itself (if any) is responsive to the cable connection.
⚠️ WARNING: Using cheap Chinese cables without certification can lead to voltage surges, which can finally disable the charging controller in the case.
If after replacing the cable and power supply, the situation has not changed, and the indicator is still silent, we proceed to a more detailed analysis of the condition of the connectors and contacts.
Cleaning contacts and eliminating oxidation
The most common reason Xiaomi AirDots or Mi True Wireless Earphones don't charge inside the case is because they're contaminated, and when they're used, they accumulate fat, dust and pile, forming an insulating film, which prevents the electric current from flowing from the case to the headphone battery.
To clean, you will need a cotton swab dipped in isopropyl alcohol or a special electronics cleaner. Do not use water, as it can cause corrosion or short circuit when you enter the case. Carefully wipe the contacts on the headphones themselves and the pins (or indentations) inside the charging case.
☑️ Cleaning contacts
Pay special attention to the deep holes in the case where the headphone legs are inserted, which often accumulates compressed dust, you can remove it with a toothpick wrapped in a thin layer of cotton cotton, and act carefully so that you do not damage the springy contacts inside.
- 🧼 Use an alcohol-containing liquid to degrease surfaces.
- 🧼 Do not wet the cotton swab too hard so that the liquid does not flow.
- 🧼 After cleaning, allow the devices to dry completely before switching on to the network.
Clean contact is a critical factor in stable work TWS-Regular prevention once a month will help avoid charging problems in the future.
Problems with the case charging connector
If the headphones inside the case charge, but the case itself does not gain power from the mains, the problem lies in the charging port. In models with a Micro-USB connector (for example, older versions of Airdots), the central tongue inside the socket often loosens or falls into place, which leads to no contact with the cable.
In newer Type-C connector models, the problem may be getting the pile out of your pocket.The material compressed in the depths of the port prevents the cable plug from entering the end. Visually, this may not be noticeable, so use a flashlight and a thin wooden or plastic toothpick for careful cleaning.
⚠️ Warning: Never use metal needles or pins to clean the charging port – this is guaranteed to short the contacts and burn the board.
If the connector is hanging or the cable falls out at the slightest movement, it may be necessary to solder the nest. At home, this is difficult to do, and it is often cheaper to buy a new case or go to the workshop.
How to check the integrity of the port?
Resetting settings and software reboot
Sometimes the hardware is good, but the power controller software is stuck. In such cases, the headphones may not respond to the case or signal the start of charging.
The reset procedure varies depending on the model. For most Xiaomi and Redmi devices, you need to remove the headphones from the case, press and hold the touch panels on both earphones for 10-20 seconds before the indicator flashes. After that, place them back in the case and close the lid for 10 seconds.
In some models, such as the Mi True Wireless Earphones 2, the reset is done by pressing a button on the case itself (if it is provided by the design) or via the Bluetooth menu on the smartphone, selecting “Forget the device”.
- 🔄 Remove the headphones and pinch the sensors before changing the color of the indicator.
- 🔄 Remove the device from the list of paired in the Bluetooth phone settings.
- 🔄 Put the headphones in the case and close the lid to reboot the controller.
After you reset, try to put the case on charge. If the indicator caught fire, then the problem was a software failure.
Deep discharge of the case battery
If you haven't used headphones for a long time and you've left the case empty, you could have a deep battery drain. Lithium polymer batteries have a protective mechanism that blocks charging when the voltage drops below critical, and in this state, the indicator may not light up immediately after you connect.
To “swing” the battery, leave the case on charging for a long time – from 2 to 4 hours, even if the indicator does not show signs of life. Sometimes the controller takes time to raise the voltage to the minimum threshold, after which the charge will go normal.
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With a deep discharge, the indicator may not light up the first 30-60 minutes of charging - this is normal, do not turn off the device before time.
Also, the "pulse charging" method: plug in and disconnect the cable every 5-10 seconds for a couple of minutes, then leave it on charge, which can help overcome the protection threshold.
| Symptoms. | Probable cause | Action. |
|---|---|---|
| The indicator flashes red. | Low charge or contact error | Clean contacts, leave on charging |
| Indicator burning white/blue | Device charged or in mode | Check the charge level in the phone |
| The indicator doesn't burn at all. | Deep discharge or chain break | Long-term charging, cable replacement |
| The indicator flashes red/white | Critical error or malfunction | Reset settings (Reset), service |
When repairs or replacements are needed
If none of the above methods worked, it is likely that the battery inside the case failed or the charging board burned, often when using low-quality high-power chargers or after moisture hit.
Replacing the battery in the case is possible, but requires soldering skills and accuracy, since the battery is often glued.The cost of repair in the service can be up to 50-70% of the price of a new device, so it is sometimes more rational to buy a new case (especially for Airdots models, which are sold separately).
When buying a new case, make sure the model is fully compatible with your headphones, as even within the same series (such as the Airdots S and Airdots Basic), charging and pairing protocols may differ.