Xiaomi's wireless headphones have become an integral part of the daily lives of millions of users, from sports training to office work. But even the most advanced AirDots, Buds or Redmi models eventually run out, and then the natural question is: how long do these gadgets charge? The answer depends on the model, the type of charger and even the ambient temperature.
In this article, we’ll break down the exact time frame for all of Xiaomi’s popular headphone lines, including the AirDots 3 Pro, Buds 4, and Redmi Buds 5. You’ll learn how to speed up charging without harming the battery, what errors lead to overheating or slow charging, and what to do if the headphones refuse to charge at all.
What depends on the charging time of headphones Xiaomi
If you've ever measured how much AirDots 2 is charging from the original cable and from the power bank, you've probably noticed a difference. Charging time depends on a few key factors:
- 🔋 Capacity of the headphone battery and case: for example, Xiaomi Buds 4 Pro have a 60 mAh battery in each headphone, and the case is 500 mAh, which affects the overall speed.
- ⚡ Power of the charger: the original adapter Xiaomi on the 5W The bank will charge the case longer than the power bank 20W.
- 🌡️ Ambient temperature: at +5°C charging can take 20-30% longer than when +20°C.
- 🔌 Connection type: Wireless charging (Qi) is always slower than wired charging, even if the case supports both options.
- 📱 Battery status: after 300+ Charging cycles capacity falls, and time may increase.
It is important to understand that full charge of the case (0 to 100%) and fast charge of the headphones (for example, 15 minutes in a case) are different processes. The manufacturer usually specifies the time for the case, not for the headphones themselves. For example, Redmi Buds 4 Active charge in a case in 1 hour, but the case itself from the socket is already 1.5 hours.
How many popular models are charged: table 2026
Below are the latest charging times for the most common Xiaomi models, all values are given for the original charger (5W) at room temperature (+20°C). If you use a higher power adapter (for example, 18W), the time can be reduced by 10-15%.
| Model | Case Charging Time (0→100%) | Charging time of headphones in the case (0→100%) | Support for wireless charging | Battery capacity (earphone/case) |
|---|---|---|---|---|
| Xiaomi AirDots 3 Pro | 1 hour 20 minutes | 40 minutes | ✅ (Qi, 2W) | 55 mAh / 520 mAh / |
| Xiaomi Buds 4 | 1 hour 10 minutes | 35 minutes | ✅ (Qi, 2W) | 55 mAh / 470 mAh / |
| Redmi Buds 5 Pro | 1 hour 30 minutes | 50 minutes | ❌ | 50 mAh/500 mAh/h |
| Xiaomi AirDots 2 | 2 hours | 1 hour | ❌ | 40 mAh/300 mAh/h |
| Redmi Buds 4 Active | 1 hour 40 minutes | 45 minutes | ❌ | 43 mAh/400 mAh/h |
Important: The charge time of the headphones in the case is specified, provided that the case is 100% charged. If the case is discharged, it will first charge, and only then the headphones will start charging.
Note that Xiaomi AirDots 3 Pro and Buds 4 support fast charging: 5 minutes in a case gives up to 2 hours of playback, but outdated models like AirDots 2 do not have this feature.
How to speed up charging without harming the battery
If you need to charge your headphones urgently but you don't have enough time, use these methods. They are battery safe (when used wisely) and really reduce the time:
- ⚡ Use a high-power adapter (18W or 20W). For example, charging from Xiaomi Mi 11 will reduce the time by 20-25%.
- 🔌 Connect the case to USB-3.0 port on the computer – it gives more current than USB 2.0.
- 🧊 Cool the case before charging (if it's hot). Overheating slows down the process.
- 📵 Turn off the headphones before placing in the case – so they will start charging immediately, not after connecting.
- 🔄 Use the original cable. Cheap analogues can limit current.
Use the 18W+ adapter
Connect to USB 3.0 or socket
Cool the case to room temperature
Turn off the headphones before charging
Check the cleanliness of contacts in the case-->
However, there are dangerous methods that can reduce the time, but kill the battery in 3-6 months:
⚠️ Warning: Never charge Xiaomi headphones from power bank with more output 20W (for example, 30W or 45W). This will overheat the power controller and reduce battery life — 5W–18W.
Also avoid charging at extreme temperatures (below 0°C or above +40°C) – this can cause the battery to bloat or the controller to fail. If the case gets too hot during charging, turn it off for 10-15 minutes.
Frequent Mistakes: Why Headphones Are Charging Too Long
If your Xiaomi AirDots or Redmi Buds are charging longer than the time indicated in the table, the problem may lie in one of these reasons:
- Contaminated contacts in a case or on headphones, dust, sweat, or cosmetics (like cream) create a barrier to current, and clean the contacts with a cotton swab dipped in alcohol.
- Cheap cables often have thin wires that limit current to 0.5A instead of 1A-2A.
- Unbalanced batteries: If one headphone charges faster than the other, it is a sign of battery wear. Try resetting (see section below).
- Software failure. Sometimes the power controller freezes. The solution is to reset the headphones to factory settings.
- Using wireless charging on models without Qi support.Redmi Buds 4, for example, doesn't have wireless charging, but some users try to charge them on Qi panels, which leads to overheating.
How to reset the headphone settings Xiaomi?
If neither method worked, the problem could be battery wear. TWS-In headphones, it takes 2-3 years (300-500 charge cycles), and then the capacity drops by 30-50%, and the charging time increases.
⚠️ Note: If the Xiaomi case stopped charging at all (the indicator does not burn), do not try to disassemble it yourself - inside there may be lithium elements that ignite when damaged.
Wireless charging: pros and cons for Xiaomi
Xiaomi AirDots 3 Pro, Buds 4 and Buds 4 Pro models support wireless charging according to the Qi standard. This is convenient, but has its own nuances:
| Pluses | Cons |
|---|---|
| ✅ No wear of the connector USB-C | ❌ Slower by 30-40% (2W vs 5W wired) |
| ✅ Convenience (just put on the panel) | ❌ Requires accurate positioning of the case |
| ✅ Less risk of contact damage | ❌ Overheating with prolonged charging |
For wireless charging, any Qi-panel with a capacity of 5W-10W is suitable. More powerful panels (15W+) will not speed up the process, since the Xiaomi case is limited to 2W. The optimal distance between the panel and the case is no more than 5 mm.
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If wireless charging is unstable, try putting the case on the panel with the indicator upwards - so the Qi coil is closer to the power source.
Important: wireless charging is not supported in Redmi Buds models (except Redmi Buds 4 Pro) and outdated AirDots 1/2.
What to do if Xiaomi headphones are not charged
If the indicator on the case does not burn when connecting to charging, or the headphones are not charged inside the case, act on this algorithm:
- Check the cable and adapter. Try charging the case from another device (like a smartphone).
- Clear the contacts on the case and headphones. Use a dry cotton swab or alcohol.
- Reset the case: 1. Open the case cover. 2. Press and hold the button on the side for 10 seconds. 3. Close the cover and plug in to charge.
- If the case is cold (below +5°C), warm it up in your hands for 5 minutes.
- Update your firmware through the Xiaomi Earbuds app (if available for your model).
If the case is charging, but the headphones are not:
- 🔍 Check if the headphones are sitting tightly in the nests of the case.
- 🔄 Try to change headphones in places (right to left nest and vice versa).
- 📱 Reset the headphone settings (see spoiler above).
⚠️ Note: If after all the manipulations the case still does not charge, and the indicator flashes red, this may indicate a short circuit in the battery.
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90% of the problems with charging Xiaomi headphones are solved by cleaning contacts or resetting settings, if it does not help, either the cable or the wear of the battery is to blame.