Xiaomi AirDots 2 charging time from 0% to 100% with and without a case

Xiaomi AirDots 2 wireless headphones (also known as Redmi AirDots 2) remain among the most popular budget headphones. TWS-The models are even years after they've been released, and they're compact, they sound decent and they're affordable, and they're appealing to users, but the question of charging time is often confusing, and some people say that the headphones charge in 30 minutes, and others complain about waiting hours, who's right?

In fact, the charging speed depends on a number of factors: the power source (USB-The computer port vs network adapter), the current charge level of the case, as well as the firmware versions of the headphones. In this article, we will analyze real-life charging times from 0% to 100%, taking into account all the nuances, and give recommendations on how to speed up the process and avoid typical errors that reduce battery life.

Official data vs real tests: how long does it take to fully charge?

According to the specifications from Xiaomi, AirDots headphones 2 should be charged in the case approximately 1.5 hourly 0% before 100%. However, these figures are obtained in ideal laboratory conditions: using the original cable, adapter on the mains. 5V/1A and ambient temperature 20–25°C. In practice, users are faced with other indicators.

Independent tests (including data from the 4PDA and Mi Community forums) show the following picture:

• 🔋 Charging headphones in the case from the network adapter (5V/1A–2A): 1 hour 20 minute – 1 hour 40 minute.
• 💻 Charging from USB-port (5V/0.5A): before 2.5 hours.
• ⚡ Charging from fast charging (Quick Charge) 3.0, 9V/2A): 1 hour 5 minute – 1 hour 15 Minutes (but requires a compatible cable!).
• 🔄 Charging the case without headphones: 1 hour 50 minutes – 2 hours 10 minutes.

Important: If the case is discharged to 0%, it charges itself first (priority), and then it starts to give energy to the headphones, which can add up to 30-40 minutes to the total time.

What the charging speed depends on: 5 key factors

If your AirDots 2 charges longer than the stated time, the problem may lie in one of the following:

1. power supply. USB-The laptop port often gives you everything. 0.5A, while the network adapter — 1A The time difference can be as high as 50 to 70%.
2. Cable: Cheap, uncertified cables have high resistance, which reduces charging current. The original Xiaomi cable or the quality USB-C → USB-A speeds up the process by 15-20%.
3. Temperature: When charging below +10°C or above +35°C, the battery controller automatically reduces the current for safety, resulting in a 20-30 percent increase in time.
4. Battery status: After 300 to 500 charging cycles, the battery capacity drops and it starts charging more slowly (especially at levels below 20%).
5. Firmware: In the early versions of AirDots 2, there was a bug that caused the case to fail to recognize the headphones at a charge level below 5%, and the firmware update solves the problem.

Now, interestingly, if you plug the case into the power source after the headphones are already inside, you can charge 10 to 15 percent faster, because the controller can recognize the load immediately.

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To check the actual charging current, use the AccuBattery (Android) or USB Meter app (for iOS via Lightning→USB adapter) to help identify bottlenecks in your power scheme.

Step-by-step: how to charge AirDots 2 for maximum service life

Despite the simplicity of the process, many users make mistakes that shorten battery life by 20 to 30 percent.

Additional recommendations:

• 🔄 Charging cycles. Try not to drain your headphones to 0%. Optimally recharge them at 10-20%.
• ❄️ If you haven't used your headphones for more than a week, remove them from your case and store them separately at 50%.
• 🚫 Prohibited sources. Do not use chargers with higher voltages. 5V (for example, from laptops 20V) — This can damage the power controller.

Compliance with these rules will help to keep the battery capacity at 80% even after 500 charging cycles (approximately 2-3 years of active use).

Table: Charging time in different scenarios

Note that if the case is discharged to 0%, it will charge itself to ~20% first, and then it will start to give energy to the headphones, which can add up to 30 to 40 minutes to the total time.

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Use of a current adapter 1A and above reduces charging time by 30-40% compared to USB-port.

Frequent Problems and Solutions: Why AirDots 2 Don't Charge or Take Too Long to Charge

If your Xiaomi AirDots 2 headphones refuse to charge or the process is abnormally slow, check the following points:

⚠️ Warning: If the case does not respond to the cable connection (no indication), try resetting it. To do this, hold the button on the case for 15-20 seconds until white and red flash. LED.

• 🔌 Problem: Case doesn't charge from the cable. Solution: Check the cable and adapter (try charging another device); Clean the case contacts with a cotton swab dipped in alcohol; if it doesn't, the power controller has a problem (repair required).
• 🎧 Problem: Headphones don't charge in the case.Solution: Make sure the headphones are properly installed (contacts must touch).Try to reset the headphones: hold the touch buttons on both headphones for 10 seconds until double blinking.
• 🐢 Problem: Charging is extremely slow (over 3 hours) Solution: Check the charging current (should be at least) 0.5A). If you use USB-Hub, connect the cable directly to the adapter. Also try to update the firmware of the headphones through the Mi Home app.
• 🔥 Problem: Case or headphones overheat during charging. Solution: Turn off power immediately! Use only original accessories. If the heat is repeated, contact the service (the battery may be faulty).

If neither of these methods worked, the charger in the case or the headphone batteries may have failed, in which case it is recommended to contact an authorized Xiaomi service center.

Comparison with competitors: who is charging faster?

For objectivity, compare Xiaomi AirDots 2 with other popular TWS-Headphones in the budget segment:

• 🏆 Realme Buds Q2: 1 hour 10 minutes (earphones) 1 hour 40 minutes (case) Quick 15-20%.
• 🥈 Huawei FreeBuds 4i: 1 hour (earphones) / 2 hours (case) Comparable, but the case charges longer.
• 🥉 Samsung Galaxy Buds Live: 1 hour (earphones / 1 hour 30 minutes (case.
• ⚡ JBL Tune 125TWS: 2 hours (earphones) / 2 hours 30 minutes (case) Slower by 30 to 40%.

As you can see, AirDots 2 is in the middle of the rankings, and its main advantage is the balance between charging speed and price. Higher-priced models (such as the Sony WF-XB700) can charge faster, but they also cost 2-3 times more.

Interestingly, AirDots 2 tests show better charging speeds than its successors, AirDots 3, which charge longer (1 hour 40 minutes) due to increased battery capacity.

FAQ: answers to frequent questions about charging Xiaomi AirDots 2