Case Xiaomi does not charge headphones: the causes of failure and how to repair yourself

Why the case stopped charging headphones - the main symptoms of the problem

Did you get Xiaomi headphones out of the case and they're dead, even though the indicator was showing full charge? Or did the headset not respond to the placement in the case? 3/4 others TWS-The most common fault is not the headphones themselves, but the case charger — its electronics, contacts or battery.

In 80 percent of cases, you can fix the malfunction yourself without going to the service center, but first you need to determine exactly the cause. For example, if the indicator on the case does not burn when you connect to the charge, the problem is more likely to be the battery case. And if the indicator is working, but the headphones are not charging, it is the contacts or the power controller who are to blame. Next, we will analyze all possible scenarios and ways to fix them.

1. Damaged or contaminated contacts are the most common cause

The contacts on Xiaomi’s case and headphones become oxidized, dusted, or mechanically damaged over time, resulting in unstable connection and no charging, especially for magnetically locked models (such as Mi True Wireless Earbuds 2), where the contacts are located on the inside of the lid.

How to check:

• 🔍 Check the contacts on the case and headphones – they should be clean and shiny (no green plaque or black spots).
• 📏 Make sure the headphones fit tightly to the contacts in the case (no backlash).
• 💡 Bring the case to the light – if the contacts are bent or chipped, repair will be required.

How to clean contacts:

1. Take a cotton swab dipped in isopropyl alcohol (at least 70%).
2. Gently wipe the contacts on the case and headphones without pressing (do not use abrasives!).
3. Let dry for 10-15 minutes, then try again charging.

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If you don't have alcohol on hand, you can use an eraser to neatly remove oxidation, but don't overdo it, because graphite crumbs can get inside the connectors.

⚠️ Warning: Do not use toothpicks, needles or metal objects to clean – this can damage contacts or puncture the headphone battery.

Case battery discharged or failed

The battery in Xiaomi cases is designed for 300-500 charging cycles. After that, the capacity drops, and the case stops holding the charge. If the indicator on the case does not light up when connecting to the USB or quickly goes out, the problem is in the battery.

How to diagnose:

Methods of resuscitation of the battery:

• 🔌 Connect the case to the original charger for 1-2 hours (sometimes helps to “rock” a deeply discharged battery).
• 🔄 Try charging the case from another USB-port (for example, on a PC or laptop).
• 🛠️ If the case does not respond at all, you will need to replace the battery (in the service or independently).

3. Failure of firmware or power controller

Xiaomi cases use a microcontroller that controls the charger of the headphones, and if it fails, the case can:

• 🔴 Do not recognize headphones when placed in a case.
• 🟡 Show the charge, but do not transfer it to the headset.
• 🟢 Blink green, but the headphones remain discharged.

How to reset the case settings:

Make sure the headphones inside the case |Plug the case to charge for 10 seconds |Plug and hold the reset button (if any) for 15-20 seconds |Put the flashing indicator (usually red-white) |Put the case off and check the charging-->

For Redmi AirDots 3 Pro and later, the reset is done via the Mi Home app:

1. Open Mi Home → Find the Mi True Wireless Earbuds.
2. Go to Settings → Reset to factory.
3. Confirm the action and wait for the case to restart.

⚠️ Warning: Reset will remove all settings pairing headphones with devices. After the procedure, you will need to reconnect the headset to the phone.

4. Problems with the cable or power supply

Often users blame the case, although the problem lies in the faulty USB-This is especially true for low-cost, uncertified cables that don't provide stable voltage.

How to check:

• 🔌 Try charging the case with another cable (preferably original from Xiaomi).
• 🔋 Connect the case to another power source (PC, power bank, other RMS).
• 📱 Check if another device is charging from this cable (such as a smartphone).

Requirements for charging Xiaomi cases:

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Using chargers with voltages higher than 5.2V can disable the power controller of the case. Always check the performance of the power supply before connecting.

5. Mechanical damage to the case or headphones

Blows, falls or moisture can cause contacts to break inside the case or damage to the control board.

• 💥 Cracks on the case body or headphones.
• 🌊 Corrosion traces (green/white plaque) on contacts or board.
• 🔊 Extraneous sounds (squeaking, crunch) when opening / closing the lid.

What to do:

• 🛠️ If the case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case case - try to glue the cracks gently with cyanoacrylate glue (without contact contact contact contact contact contact!).
• 💧 If moisture is ingested, do not turn on the case for 24-48 hours, let it dry in rice or silica gel.
• 🔧 If the control fee is damaged, contact the service (self-repair requires soldering skills).

6. Software errors of headphones or smartphones

Sometimes the case is working, but the headphones do not charge due to a firmware failure of the headset itself or a conflict with the phone. This is true for models with support for Mi AI Assistant (for example, Xiaomi Buds 4).

How to eliminate:

1. Reconnect the headphones to your phone: Forget the device in Bluetooth settings. Put the headphones back in the case, close the lid for 10 seconds. Remove and reconnect.

Update the firmware

Mi Home

Open Mi Home → Find headphones → Settings → Software Update

Reset the headphone settings

Tap the sensor on the headphone three times for 2 seconds

In 2023, Xiaomi released an update for the Redmi Buds 4 Pro, eliminating a bug with a "false" case discharge. OTA-updates, be sure to check the relevance of the firmware.

7. Broken case or fake - how to distinguish

If the case stopped charging the headphones immediately after purchase, the likelihood of marriage or forgery is high, especially at risk buyers on marketplaces (for example, AliExpress), where replicas are often sold.

Signs of forgery:

• 🏷️ No serial number on the package or package.
• 🔋 The battery of the case discharges in a few hours (the original holds 2-3 days).
• 🎨 Poor build quality: backlashes, uneven seams, dull indicator.
• 📦 There is no documentation in the package or it is in bad Chinese.

How to check the originality:

1. Check the IMEI case with the data on the official Xiaomi website (if supported).
2. Check the serial number through the Mi Home app.
3. Estimate the weight of the case - fakes are usually 10-20% lighter than the original.

⚠️ Warning: Fake cases can damage headphones due to unstable voltage.If you suspect a fake, stop using and contact the seller for a refund.

FAQ: Frequent questions about charging Xiaomi cases