How to charge Xiaomi headphones without a case: working methods and precautions

Charging case for TWS-Xiaomi headphones are not just a convenient package, but the only “official” way to recharge the battery power. But what if the case is lost, broken or discharged at the most inopportune moment? It turns out that there are alternative charging methods that can help bring headphones back to life without the original case. It's important to understand that not all methods are equally safe, and some can damage the device if used incorrectly.

In this article, we will discuss 5 working ways to charge Xiaomi headphones (including models Redmi AirDots, Mi True Wireless, Buds) 3/4 Pro and others) without using the native case, you will learn what tools you will need, how to minimize the risks of overheating or short circuit, and what to do if the headphones do not turn on after charging. Special attention will be paid to hidden contacts on the headphone case - their location and purpose often become the key to successful recharging.

We warn you that all methods, except the use of a universal charger, require care. If you are not sure about your electronics skills, you should contact the Xiaomi service center or buy a new case. But if you do not have time or the ability to wait, read on.

Why can’t you just connect your headphones to the charger?

Unlike smartphones or tablets, TWS-The headphones do not have a standard connector. USB-C Or Micro-USB for direct charging, and manufacturers hide the power contacts inside the case to make sure that they're not connected:

• 🔋 Reduce the size of the device - additional connectors would increase the dimensions of the headphones.
• 🛡️ Protect against moisture and dust – open contacts would reduce the degree of protection by the standard IPX4/IP54.
• 🔌 Eliminate improper charging – direct current supply without control can disable the battery.
• 💰 Encourage the purchase of original accessories – cases are often sold separately.

However, the headphones do have charging contacts, hidden under rubber plugs or on the inside of the case (where the headphone comes into contact with the case), which can be used to connect to alternative power sources, but with caution.

⚠️ Attention: Voltage supply higher 5V more-current 1A It can cause the battery to bloat or the power controller to burn. Always check the power supply before connecting!

Method 1: Use of a universal charger for TWS

The safest and easiest method is to purchase a universal charging case or adapter for the use of a battery. TWS-These are the devices that are sold on AliExpress, in electronics stores (DNS, M. Video, Citilink, or marketplaces (Wildberries, Ozon:

• 🔌 Compatibility – suitable for most models Xiaomi, Redmi, Haylou and other brands.
• 🔋 Current control – built-in controller prevents overcharging.
• 💡 Indication – LEDs show the charging process.
• 🔄 Reusable – can be used for different headphones.

How to choose a universal case:

1. Make sure that the description indicates Xiaomi models (e.g. Redmi AirDots, Mi True Wireless 2).
2. Check reviews – some cheap adapters may not recognize headphones.
3. Pay attention to the material of contacts - it is better to choose golded or copper (not oxidized).

If you have chosen this method, follow the instructions:

Check the compatibility of the case with your headphone model|

Make sure the contacts of the case are clean (wipe with alcohol)|

Place the headphones in the nests of the case according to polarity (usually marked «+» and «-»)|

Connect the case to the power source (block) 5V/1A)|

Wait for full charging (the indicator will change color or go out)-->

Method 2: Direct charging through contacts (for experienced)

This method requires precision and care, but it is suitable if there is no place to buy a universal case and the headphones urgently need to be charged.

• 🔌 Power supply 5V/0.5–1A (smartphone-like).
• 🔧 Thin wires (for example, from unnecessary headphones).
• 🧲 Magnet or tweezers – to hold wires.
• 🔍 Lump or flashlight – to see the contacts.

Steps:

1. Find contacts on the inside of the headphone (where it comes into contact with the case), usually 2-4 metal dots. Xiaomi models often use:
2. Defining Polarity: Extreme Contacts — + and −. Central (if any) – can be a Hall sensor (do not touch it!).

Connect the wires.

• Red wire (+) — single-point.
• Black wire (−) — elsewhere.
• Secure the wires with a magnet or tweezers (they should not hang around!).
• Power for 10-15 seconds, then turn off. Repeat 3-4 times intermittently (to avoid overheating the battery).

⚠️ Note: If the headphone is heated above 40 after connection°C or the smell of burning comes on, turn off the power immediately! This is a sign of short circuit or mispolarity.

Method 3: Charging through a wireless coil (for models with Qi support)

Some Xiaomi models (e.g. Mi True Wireless Earphones) 2S Buds 3 Pro supports wireless charging standard Qi. If your headphones are equipped with this feature, you can try charging them through the Qi standard:

• 📱 Charging platform for a smartphone (for example, from Xiaomi Mi Wireless Charging Pad).
• 🔋 Power Bank with wireless charging.
• 🚗 Car wireless charging (if any).

Instructions:

1. Check if your model supports Qi (the information is available in the specifications on the Xiaomi website).
2. Place the headphone on the charging pad with contacts down (where it usually comes into contact with the case).
3. Make sure the indicator on the headphone flashes or burns red (meaning charging).
4. Charge no longer than 30 minutes - the effectiveness of this method is low.

Cons of the method:

• ⚡ Slow charging (full cycle can take several hours).
• 🔋 Not all models support Qi – check in advance.
• 📍 The headphone should lie strictly in the center of the coil, otherwise charging will not go.

Yeah, I did)|

No, but I want to try |

I don't know, I haven't)|

I have a different model.-->

Method 4: Using a charger from other headphones

If you have a case from others TWS-headphones (e.g. Haylou, Realme, Huawei), you can try charging Xiaomi through it:

• 🔌 Contacts in the case should match the location with contacts on headphones Xiaomi.
• 🔋 Case tension - strictly 5V (Check the sticker on the back side).
• 🧲 There should be no magnet in the case that can block charging (in some models, the magnet turns off power when opened).

How to check compatibility:

1. Take a piece of paper and circle the contacts on Xiaomi headphones.
2. Compare it to the location of contacts in someone else's case.
3. If the distance and shape match, carefully place the earpiece in the socket.
4. If the charging indicator is on fire, the method works!

Options of compatible cases (according to user reviews):

⚠️ Warning: If the headphone starts beeping or flashing red after you've connected, remove it immediately.

Method 5: Emergency battery charging (extreme case)

If there is no case or charger at hand, and headphones need to be urgently revived, you can use a finger battery (for example, a finger battery, AAA or CR2032). This method is risky, but sometimes helps in the field.

What you need:

• 🔋 Battery 1.5V (AA or AAA) or 3V (CR2032).
• 🧵 Thin wires (can be taken from old charging).
• 🧲 Scotch or tape - for fixation.

Procedure:

1. Connect the wires to the battery contacts (+ and −).
2. Carefully touch the free ends of the wires to the contacts on the headphone (hold no longer than 5 seconds!).
3. Repeat 3-4 times with breaks of 1 minute.
4. Check whether the headphone is turned on (usually after such a charge it takes 10-20 minutes of work).

Critical: Never use batteries with higher voltages 3V (for example, 9V «Crohn's" - this will instantly burn the headphone power controller!

💡

If only a battery is available at hand. 9V, You can reduce the voltage by connecting 2-3 diodes in series (for example, from the old one). LED-This will reduce the voltage to a safe 3–5V.

What to do if the headphones are not charged?

If after all the manipulations, the headphones do not respond to charging, check the following:

• 🔌 Contact status - wipe them with a cotton swab soaked in alcohol.
• 🔋 Battery - if the headphones were not turned on for more than a month, the battery could be deeply discharged (you need a "push" with current) 0.5A within 10-15 seconds).
• 🔧 Polarity – You may have confused it. + and −.
• 💻 Software glitch – try resetting your headphones to factory settings (usually by pressing the button for 10 seconds).

If the headphones are turned on but immediately turned off, the problem may be:

• 🔋 A very worn-out battery (replacement needed).
• 🔌 Oxidized contacts inside the housing (need cleaning).
• 💡 Faulty power controller (requires repair).

💡

If the headphones are not charged by any means, the problem is likely to be a hardware malfunction (chain break, burnt-out controller).

FAQ: Frequent questions about charging without a case