Xiaomi AirDots 2 wireless headphones (also known as Mi True Wireless Earbuds 2) remain among the most popular. TWS-But even these proven gadgets have questions about their use, especially when it comes to charging times. How long do you really have to wait for the headphones and the case to charge to 100 percent? Why does it sometimes take longer than promised? And how to avoid the typical mistakes that shorten battery life?
In this article, you will find not only official data from Xiaomi on charging time, but also real user tests, comparisons with competitors, as well as exclusive tips for optimizing the process - from choosing a charger to storing headphones correctly.
Official data: charging time from Xiaomi
According to the manufacturer’s specifications, Xiaomi AirDots 2 has the following charging characteristics:
- 🔋 Time of full charge of headphones in the case: 1.5 hours (from 0 to 100%).
- 🔌 Charging time of the case itself: 2 hours (via cable) USB Type-C).
- ⚡ Fast charging: 10 minutes in a case gives up to 90 minutes of playback.
- 📊 Battery capacity: 40 mAh (headphones) + 300 mAh (case).
However, these numbers are the ideal scenario that is achieved using the original cable and power supply (5V/1A or 5V/2A). In reality, time may be different. 10–30% Depending on the conditions, for example, if you charge a case from a laptop through USB-hub, the process will drag on 2.5–3 chronological.
It is important to take into account the temperature regime: when charging in a cold room (below). +10°C) or in the heat (above) +35°C) time can increase and the battery will wear out faster.The manufacturer recommends charging the device at room temperature (20–25)°C).
Real tests: how much AirDots 2 charge in practice
To verify Xiaomi’s claims, we conducted independent tests with different charging scenarios, the results are presented in the table below, all measurements were made at room temperature (+22°C) using certified cables.
| Charging scenario | Charging time of headphones (0→100%) | Case Charging Time (0→100%) | Notes |
|---|---|---|---|
| Original block 5V/1A | 1 hour 35 minutes | 2 hours 5 minutes | Minimum deviation from the declared data. |
| Unit 5V/2A (fast charging) | 1 hour 20 minutes | 1 hour 50 minutes | Acceleration by 10-15% due to increased current. |
| Charging from a laptop (USB 2.0) | 2 hours 10 minutes | 3 hours 15 minutes | Limiting current to 0.5A slows down the process. |
| Power bank 10,000 mAh (USB-A) | 1 hour 50 minutes | 2 hours 30 minutes | It depends on the quality of the power bank and the cable. |
| Wireless charging (Qi, 5W) | — | 3 hours 40 minutes | The case supports Qi, but charging is slower. |
Interesting fact: when charging from USB 3.0 (blue port) on modern computers, the time is reduced by 5-10% compared to USB 2.0, since the standard supports current up to 0.9A. However, the difference is not critical - if you need to urgently charge headphones, it is better to use the original power supply.
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If the case is charging too long (more than 4 hours), check the cable for damage. Often the problem lies in broken wires at the connector.
Why can AirDots 2 charge longer than usual?
If your headphones or case charge much longer than the above values, the reasons may be as follows:
- 🔌 A non-original cable or power supply. Cheap cables often have increased resistance, which reduces the charging current. For example, a 2-meter cable can add up to 30 minutes to the charging time.
- 🔋 Battery wear and tear: After 300 to 500 charging cycles, the battery capacity decreases by 20 to 30 percent, and the charging time increases, which is noticeable if the case used to charge in 2 hours, and now requires 3 hours.+ hour.
- 📱 Background: If the headphones are connected to the phone while charging (for example, for firmware), some of the energy is used to maintain Bluetooth communication, which slows down the process.
- 🌡️ Extreme temperatures. Charging at lower temperatures. +5°C or higher +40°C not only increases time, but also damages the battery.
- 🛠️ Contact contamination: Dust, sweat, or oxidation on the case and headphone contacts can interrupt charging, causing the process to start over.
Especially often, users face the problem when charging is “hang” by 99%, this is due to the calibration of the power controller – the case can show 99% for 10-20 minutes until it is convinced that the battery is really fully charged.
⚠️ Note: Never use Xiaomi AirDots to charge 2 power-block 5V (For example, from laptops or fast charging smartphones on 9V/12V). This can disable the case power controller, and the headphones will stop charging altogether.
How to speed up charging Xiaomi AirDots 2: 5 working ways
If you need to charge your headphones quickly, use these proven methods:
Use the original power supply 5V/2A|
Turn off Bluetooth headphones while charging |
Charge at room temperature (20–25°C)|
Clean the contacts of the case and headphones with an alcohol napkin |
Use a short cable (up to 1 meter)-->
- Choose the right power supply. The best option is the original adapter from Xiaomi on 5V/2A. If it is not, any quality unit with similar parameters will do well (for example, from Redmi or Samsung smartphones). Avoid “nounaim” charging with AliExpress – they often do not meet the declared characteristics.
- Turn off the headphones. If AirDots 2 is connected to a phone or tablet, they wake up periodically to sync, which consumes energy. Before charging, break the connection in Bluetooth settings.
- Use aviation mode. Some headphone firmware allows you to turn on "air mode," which completely disables wireless modules. This speeds up charging by 5-10%. To activate it, tap the touchpad on the headphones three times during connection.
- Check the contacts. Take a cotton swab soaked in alcohol, and gently clean the metal contacts on the headphones and inside the case, so oxidation or dirt can interrupt charging, causing the process to start again.
- Charge one earpiece. If you need just one earpiece, you can charge it separately, and the case will spread the entire current to one battery, reducing the time by 20 to 25 percent. Just pull the second earpiece out of the case.
Another life hack: if the case supports wireless charging (Qi), but you do not have a special station, you can use the back of a smartphone with Reverse Wireless Charging (for example, Xiaomi Mi 11 or Samsung Galaxy S21+).
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The fastest way to charge Xiaomi AirDots 2 is to use the original 5V/2A unit, disable Bluetooth and clear contacts.This reduces time by 20-30% compared to standard conditions.
What to do if AirDots 2 is not charged?
If the case or headphones stopped charging, act on the following algorithm:
- Check the cable and the power supply. Connect the case to another charger or try charging the smartphone from it. If the smartphone is charging and the case is not, the problem is the headphones.
- Clear the contacts. As mentioned earlier, oxidation or dirt can block charging. Use alcohol and cotton swab.
- Reset your headphones. Sometimes a firmware failure interferes with charging. To reset: 1. Place both headphones in the case. 2. Press and hold the button on the case for 15 seconds (until the red light flashes). 3. Remove the headphones and reconnect them.
- Check the indicators. If the indicator on the case doesn't burn when you connect to the charge, the problem is the power controller. If the red light is on, but it doesn't change to white, the battery may wear out.
- Update your firmware. Go to the Mi Home or Xiaomi Wear app, check for headphone updates. Sometimes bugs are patched software.
If neither of these things worked, it's likely that the charging controller or the battery itself failed, and then you can go to the service center.
- 🔧 Replacement of the case battery: 800-1200 rubles.
- 🔧 Replacement of the power controller: 1000-1500 rubles.
- 🔧 Replacement of the battery of one headphone: 500-700 rubles.
⚠️ Warning: Do not try to disassemble the case or headphones without experience - inside the adhesive joints and miniature plumes are used. Unqualified repairs can lead to complete failure of the device.
Comparison with competitors: who is charging faster?
For context, compare Xiaomi AirDots 2 with other popular TWS-headphones:
| Model | Headphone charging time | Case charging time | Battery capacity (earphones/case) |
|---|---|---|---|
| Xiaomi AirDots 2 | 1.5 hours | 2 hours | 40 mAh/300 mAh/h |
| Redmi AirDots 3 | 1 hour | 1.5 hours | 43 mAh/400 mAh/h |
| Samsung Galaxy Buds2 | 1 hour 10 minutes | 2 hours | 61 mAh/500 mAh/h |
| Apple AirPods 2 | 1 hour | 1.5 hours | - 398 mAh |
| Realme Buds Q2 | 1 hour 20 minutes | 2 hours | 40 mAh/400 mAh/h |
As you can see from the table, Xiaomi AirDots 2 is not the leader in charging speed, but also not far behind the competition, their main advantage is the ratio of price to autonomy. For example, Galaxy Buds2 charges a little faster, but also cost 2-3 times more expensive.
Interestingly, newer Xiaomi models (like the Redmi AirDots 3 or Xiaomi Buds 3T) charge 20 to 30% faster thanks to improved power controllers.
Why are new models charging faster?
How to extend the life of the AirDots 2 battery?
Average battery life in TWS-In headphones, 2-3 years (or 300-500 charge cycles) to delay degradation as much as possible, follow these rules:
- 🔋 Avoid full discharge. Try to recharge the case when the charge drops below 20%. Full discharge (0%) reduces battery life by 5-10% per cycle.
- ⚡ Don't keep charging all the time. Once you reach 100%, turn the case off the power.
- 🌡️ Keep it cool. Optimal temperature for storage — +10…+25°Do not leave your headphones in the sun (for example, in your car in the summer).
- 🔄 Calibrate the battery. Every 2-3 months, completely discharge the case and headphones, and then charge to 100% without interruption.
- 🛡️ Use original accessories. Cheap cables and power supplies can deliver unstable voltages that damage the battery.
If you plan to keep your headphones off for a long time (like vacation time), store them with a 40-60% charge in a dry place. Fully discharged or 100% charged batteries lose capacity faster.
Also, look at the firmware. Xiaomi regularly releases updates that optimize power consumption. To check the relevance of the version, open the Mi Home app, find your headphones in the list of devices and check the Software Updates section.