Why Xiaomi headphones do not charge in the case: full diagnosis and repair

Did you get Xiaomi headphones out of the case and they're dead -- even though the case itself is 100% chargeable? Or does one headphone charge and the other not? This problem is familiar to many owners of Redmi AirDots, Mi True Wireless and others. TWS-And 80 percent of the time, it's not just a breakdown, it's just a simple communication failure or a software error, but how do you pinpoint the cause and fix it without going to the service?

In this article, we’ll look at all the possible reasons why Xiaomi earphones don’t charge in a case, from contaminated contacts to a damaged power controller, you’ll get step-by-step self-diagnosis instructions, checklists and a charger compatibility table, and if the problem turns out to be hardware-related, you’ll know how much it costs to repair and whether it’s worth it.

1. Checking the obvious: 5 steps before repair

Before you take apart the case or bring the headphones to the service, eliminate the simplest causes. In 30% of cases, the problem is solved in 5 minutes without tools.

• 🔋 Case Charge: Connect the case to charge for 10-15 minutes. The indicator should flash or burn red/orange. If not, the problem is in the case itself, not the headphones.
• 🧹 Contact contamination: Light a flashlight on the metal pads in the case and on the headphones. Do you see fibers, dust or oxidation? Clean them carefully with a cotton swab dipped in alcohol.
• 🔄 Reboot the headphones: Put both earphones in the case, close the lid and wait 30 seconds. Then pull them out and hold the touch buttons (or mechanical buttons) for 10-15 seconds until reset.
• 🔌 Cable and Power Unit: Try charging the case with another cable and unit (preferably original from Xiaomi with Quick Charge support). 5V/1A higher.
• 📱 Reset pairing: Remove the headphones from the list of Bluetooth devices on your smartphone, then repair.Sometimes firmware failures block charging.

If the headphones still don't charge after this, go to deep diagnostics. Pay special attention to the Redmi AirDots 2/3 and Mi True Wireless 2 models - they are most often denied contacts due to design features.

2.Contacts: the main cause of 60% of malfunctions

Metal pads (pins) on headphones and in the case are the most vulnerable places, they are oxidized, contaminated or deformed by mechanical stress.

• ⚡ Oxidation: Green or white coating on the contacts, removed with alcohol (70% or higher) and a soft brush (such as a toothbrush), do not use acetone or solvents, they will damage the plastic!
• 🧲 Magnetic displacement: If the earpiece is not locked in the case socket, check the magnets. They may unstuck or shift. In this case, the case does not recognize the earpiece and does not supply power.
• 🔧 PIN Strain: Contacts on the earpiece or in the case are bent. Carefully straighten them with tweezers, but don't overdo it - they're fragile!

To clean the contacts, use:

1. Cotton swabs soaked in isopropyl alcohol.
2. Laser (washing gum) for the removal of oxides.
3. A toothbrush with soft bristles for hard-to-reach places.

Check the contacts visually on headphones and in the case

Clean the metal pads with alcohol

Make sure the headphones are tightly fixed in the nests

Try charging after cleaning.

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⚠️ Warning: Do not use needles, knives or other sharp objects to clean contacts.The risk of damaging the board or breaking a pin is 90%!

3. Software failures: when firmware is to blame

If the contacts are clean, the case charges, but the headphones still do not take charge - the problem may be in the firmware of the headphones or the case.

• 🔄 The headphones are turned on but immediately switched off.
• 🎧 The charging indicator flashes red and goes out.
• 📱 In a mobile application (for example, Mi Home) a connection error is displayed.

Decisions:

1. Reset to factory settings: Put your headphones in the case. Press and hold the touch buttons on both headphones for 15-20 seconds (before the indicator flashes in red/white). Pull out the headphones and perform the pairing again.
2. Firmware Update: For models with support for updates (e.g. Xiaomi Buds) 3/4 Mi True Wireless 2) Use the official Mi Home or Xiaomi Wear app. Path: Device Profile → Firmware update.

If the reset didn't work and there's no updates, it might be the power controller on the headphone board that's damaged, and you need to flash it through a service cable (like USB-C to TWS), which you can't do at home.

4. Hardware breakdowns: when without repairs can not do

If all the software methods have been tried and the headphones are still not charging, the problem lies in the hardware.

To diagnose hardware breakdowns, you will need a multimeter (chain vertebrae) or USB-If you don't know electronics, you should go to the service. Self-repair without skills can be dangerous:

• 🔥 Short circuit (if you confuse polarity in soldering).
• 💥 Battery damage (risk of electrolyte swelling or leakage).
• 🚫 Loss of warranty (if the device is still under warranty).

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Before visiting the service, take photos of your headphones and case from different angles, as well as write down the serial number (usually on a sticker under the case cover), which will speed up the diagnosis and protect against replacement of components.

5. Charger compatibility: why the case does not take current

Many users are unaware that Xiaomi uses specific power controllers in its headphone cases. If the charger does not meet the requirements, the case can:

• 🔌 Don't charge at all.
• ⚡ Charge extremely slowly (e.g. 1% in 30 minutes).
• 🔥 Overheating during charging.

Requirements for chargers for Xiaomi cases:

• 🔌 Tension: 5V (standard USB). Some models support Quick Charge 3.0 (9V), But it's not necessary.
• ⚡ Current: Minimum 0.5A, optimally 1A–2A. Blocks on 0.3A (For example, from old smartphones, it will not work.
• 🔄 Type of cable: Original USB-C certified USB-A C. Cheap cables may not transmit current data.

If the case is not charged from a computer or laptop, try:

1. Connect to the outlet through the original power supply.
2. Use it. USB-feed-in.
3. Check the USB port on your computer – some ports only give 0.1A (not enough to charge).

6.Special cases: specifics of Xiaomi models

Some Xiaomi headphones have unique charging problems.

Redmi AirDots (1/2/3 generation)

A common problem: the right earphone doesn't charge, although the left earphone is working normally, and the reason is the weak spring contacts in the case.

1. Carefully bend the contacts in the socket of the right earpiece (use a plastic shoulder blade).
2. Check the magnets – they often fall off after falls.

Mi True Wireless 2

This model often resets its charging settings after updating the firmware.

1. Reset the headphones to factory settings (hold both touch panels for 20 seconds).
2. Update your firmware through Mi Home to the latest version.

Xiaomi Buds 3/4 Pro

Problem: the case charges, but it doesn't give the headphones any power.

• Let the case cool for 10-15 minutes (if it is warm).
• Use the original USB-C cable – cheap analogues are blocked by the controller.

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If you have Redmi AirDots 3 Pro or Xiaomi Buds 4, never use wireless charging from other brands (such as Samsung or Apple).The Xiaomi Power Controller may block charging due to incompatible protocols.

7. When to contact the service: criteria and cost

If you have exhausted all the ways to repair yourself, it is time to contact the specialists.

• 🔋 The headphone battery swelled (seems to be on the bloated cover).
• 🔥 Case warms or smells of a burn when charging.
• 🛠️ On the board, burned elements are visible (blackened chips).
• 💻 Headphones are not determined by the computer when connected via a service cable.

Average prices for repairs in service centers (for 2026):

⚠️ Warning: Unofficial services often install non-original batteries with lower capacity. Require a replacement warranty of at least 6 months and a check indicating the model of the battery.

Frequent Questions (FAQ)