The question of how long it takes to fully charge Xiaomi Airdots wireless headphones is one of the most frequent among owners of budget but high-quality acoustics. The autonomy of the device depends on the correct operation of the battery, and understanding the charging cycles avoids rapid wear and tear of the battery. Unlike flagship models, budget versions often do not have fast charging, which requires more attention to the process of replenishing energy.
The average time to fully recover the capacity of the headphones themselves varies from 1 to 1.5 hours, while the charging case can be charged up to 2.5 hours. It is critical not to leave the case on charging more than 3-4 hours after the indicator sunburn, since power controllers in budget models may not have a complex system of protection against overcharging. Ignoring this fact can lead to bloating of the battery or a significant decrease in its life.
In this article, we will take a closer look at the different charging times between the different generations of Redmi Airdots, Airdots 2 and Airdots 3. You will learn how to interpret LED signals correctly and what to do if the headphones stop holding charge. Understanding the physical processes that occur inside lithium polymer batteries will help you extend the life of the gadget for many months.
Factors affecting charging speed
The speed at which energy is recovered in your Xiaomi Airdots depends not only on the capacity of the built-in battery, but also on a variety of external and internal factors. Battery production technology, device age and even ambient temperature play a key role. Standard models such as the Airdots S or Airdots Basic have batteries with a capacity of about 40-43 mAh, which dictates certain time frame for their saturation.
The power supply has a significant impact. Using a powerful power supply from a modern smartphone with Quick Charge support will not speed up the process, since the controller in the headphones will limit the current at a safe level (usually 50-100 mA). Moreover, using cheap high-resistance cables can increase the charging time by one and a half times due to the drop in voltage on the wire.
The temperature is also not to be ignored: at low temperatures, the chemical reactions inside the battery slow down, which increases the charging time; in heat, on the contrary, the speed can increase, but this carries risks of overheating and degradation of the electrolyte. The optimal is considered room temperature in the range of 20-25 ° C.
Charging time of different Airdots models
Different generations of headphones from Xiaomi and Redmi have different battery characteristics, which directly affects the time of their charging. The first models of the Airdots series often came with more capacious batteries in the case, but the headphones themselves charged standardly for about 1.5 hours. New modifications, such as the Airdots 3, can support more efficient charging algorithms.
Below is a table showing the approximate full charge time for popular models, and it is worth considering that these values are relevant when using a serviceable 1A charger.
| Model headphones | Headphone battery capacity | Headphone charging time | Case charging time |
|---|---|---|---|
| Xiaomi Airdots / Redmi Airdots Basic | 43mAh | ~1.5 hours | ~2-2.5 hours |
| Redmi Airdots S | 43mAh | ~1.5 hours | ~2-2.5 hours |
| Redmi Airdots 2 | 40mAh | ~1-1.5 hours | ~2 hours |
| Redmi Airdots 3 | 35mAh (earphones) | ~1 hour | ~1.5 hours |
It's important to understand that the values in the table are averaged. Real time can vary depending on the degree of battery discharge at the time of connection to the network. If you charge fully "killed" headphones, the initial stage (up to 60-70%) will pass faster, and the final finishing to 100% will take longer because of the balancing algorithms of the cells.
Why does charging time change with time?
How to know if the headphones are charged
Charging status in Xiaomi Airdots is determined by using light indicators located on the headphone body and on the front panel of the charging case. The interpretation of these signals may vary depending on the generation of the device, so it is important to know the features of your model. The basic versions of Airdots and Airdots S are characterized by a red indicator during charging.
When you put your headphones in your case and plug it into the network, a red LED lights up, which signals that there is an active energy storage process. In some versions, such as the Airdots 2, the indicators on the headphones themselves can flash white lights to show the pairing process, but when installed in the case, they should burn or flash red/orange, indicating charging.
Full charge is determined by the change in color or quenching of the indicator:
- 🔴 Red lights – the charging process is underway (level below 100%).
- ⚪ White burning (on the case) - the case is fully charged.
- 💡 Indicators go out – headphones inside the case are charged to 100%.
- 🔴 Flashing red – the case is discharged or contact error.
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If the headphone indicator doesn't light up when you put it in the case, wipe the metal contacts on the headphones and inside the case with a dry cotton swab. Oxidation or dust often blocks charging.
Charging case features
The Airdots charger case acts as a Power Bank for the headphones themselves. Its capacity is usually between 300 and 400 mAh, which allows the headphones to be charged 3 to 5 times depending on the model. The charging time of the case itself is usually longer than the charging time of the headphones, and averages 2-2.5 hours.
Case indications are often simplified. Redmi Airdots base models have only one indicator that shows the charge status of the case itself: If it burns red when the cable is connected, the case charges; if white is complete, the charge is complete; if the cable is connected, the lack of glow may indicate a deep discharge or malfunction.
⚠️ Warning: Do not use high-voltage Quick Charge (Power Delivery) power supplies to charge your case unless the instructions say otherwise. Although controllers usually do, power surges at the start can damage the cheap electronics of the case. Use the standard. USB-port 1And (5V/1A).
There's also a nuance about the "sleep mode" of the case, where if the case was lying idle for a long time, it could go into a deep discharge, in which case the indicator may not catch fire immediately, you need to leave the device on charge for 15-20 minutes to "rock" the battery, after which the indication should appear.
☑️ Checking the correctness of the case charging
Typical problems and their solution
Xiaomi Airdots users often experience headphones charging unevenly or not at all. One of the most common problems is contact oxidation. Because the devices are often used during training, sweat and moisture are released to the contact areas, creating an oxide film that prevents current from passing.
Another common problem is that the controller is software-based, and the headphones may think they're already charged, or they may not see the network connection, and in such cases, the reset procedure helps, and this requires removing the headphones from the case, pinching the touch areas for 20 seconds (or until they flash red), and then putting them back into the charging case.
If one headphone is charging faster than the other, it may indicate:
- 🔋 Different degree of battery wear (if the device is more than a year old).
- 💻 Programmatic desynchronization of charge percent.
- 🔌 Bad contact of one of the headphones in the case (check the magnets).
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Uneven charging of the left and right headphone is most often solved by cleaning contacts with alcohol or cotton swab, and does not require complex repairs.
How to extend the life of the battery
To keep your Redmi Airdots as long as possible, you have to follow certain rules for lithium polymer batteries. The main enemy of the battery is deep discharge. Don't let the headphones run out completely and stay in this state for weeks, and it causes irreversible chemical processes that reduce capacity.
Avoid overheating, do not leave a case with headphones in direct sunlight, such as on a car torpedo in summer or on a window sill. High temperature destroys the structure of the electrolyte. The optimal charge level for long-term storage is about 60-70%.
Care advice:
- 🧼 Regularly clean your contacts of earwax and dust.
- 🌡️ Avoid extreme temperatures (below 0)°C and above 45°C).
- 🔌 Use only whole cables without inflections.
⚠️ Warning: If you notice that the case or headphones have started to get very hot during charging (unpleasant to hold in your hand), immediately disconnect them from the network.This is a sign of an internal short circuit or a controller malfunction, which can lead to fire.