The situation when a couple TWS-Headphones stop charging one module, is one of the most common problems owners of budget and medium-budget electronics. Often users are faced with the fact that the indicator on the case is on, the music is playing, but the left or right channel discharges faster or does not respond at all to the installation in the dock. This can be caused by banal contact oxidation, a software failure of the power controller, or physical damage to the battery.
Before you carry a device to a service center or buy a new headset, you need to conduct a thorough diagnosis. In most cases, the problem is not the failure of the battery, but the violation of the electrical contact between the pins of the case and the earpiece itself. Deep discharge can also block the start of charging, requiring specific actions to “wake up” the battery.
This article provides a detailed guide to troubleshoot charging in Xiaomi Redmi Buds, Mi True Wireless Earbuds and AirDots. We will discuss the methods of mechanical cleaning, software calibration and checking the health of the charging case. Remember that accuracy in performing procedures is critical to maintaining the warranty and integrity of the gadget.
Diagnostics and initial examination of contacts
The first step is always to visually and tactilely check the contact areas, and there are metal pins on the surface of each earphone and inside the recess of the case, through which energy is transferred, and over time, earwax, skin fat and dust accumulate on them, creating an insulating film, and this invisible barrier is the most common reason that the charging indicator does not light up.
To clean, you'll need a cotton swab lightly soaked in isopropyl alcohol or a special electronics cleaner. Do not use water as it can cause corrosion or short circuit. Gently wipe the golden or silver contacts on the earpiece itself and the spring-loaded reciprocating pins inside the case. Movements should be soft so as not to damage the coating.
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Use a dry toothbrush with soft bristles to remove dry dust from the depths of the case charging ports before wet contact processing.
After cleaning, let the alcohol evaporate completely within 2-3 minutes. Then place the problem earphone in the case and press it lightly with your finger for 10-15 seconds. If the LED in the case or on the headphone case flashes white or red, then contact is restored. In some cases, you need to take out and insert the earphone several times to activate the spring-up mechanism.
- 🔍 Carefully inspect contacts for black spots of oxidation or green plaque.
- 🧹 Use only lilaless fabrics or cotton swabs for cleaning.
- ⚡ Check if the pins inside the case fall when pressed.
- 🧴 Avoid the use of aggressive chemicals other than isopropyl alcohol.
Device discharge and calibration methods
If mechanical cleaning didn't work, there's a high probability of a software failure of the power controller. The internal headphone firmware may not correctly read the charge level or block the current input due to an error in the logic of the work, and in such situations, the effective solution is to completely reset the settings (Hard Reset) to factory parameters.
The reset procedure for different Xiaomi models may be different. For most models without a physical button on the case (for example, Redmi AirDots), you need to pinch the touch areas on both headphones simultaneously for 20-30 seconds until the indicators flash red several times. For models with a button on the case (for example, Mi True Wireless Earphones 2), you need to put the headphones in the case, open the lid and hold the reset button for about 10 seconds.