The question of how long it takes to fully charge Xiaomi AirDots wireless headphones is one of the most frequent among owners of budget acoustics. The speed of energy recovery directly affects the ease of use of the gadget in everyday life, especially for those who are used to active rhythm. Understanding the technical nuances of the process allows you to effectively plan the use of the device and avoid unpleasant situations when the music is cut off at the most inopportune moment.
Charging times can vary significantly depending on the model, the state of the charging port and the power source used. Modern versions of True Wireless stereo systems from Xiaomi are equipped with more advanced power controllers, which allows you to speed up the process, but older models are still in circulation. In this article, we will discuss in detail the technical characteristics, charging the case and the headphones themselves, and give recommendations for the care of lithium polymer batteries.
Technical characteristics and battery capacity
To understand how long the process will take, you need to look at battery specifications. Most AirDots models, including the popular Redmi AirDots and Mi True Wireless Earbuds Basic, use compact cells with a capacity of about 40-43 mAh in each headphone. Case, acting as a portable power bank, usually has a capacity of 300 to 430 mAh, which provides several complete cycles of recharging the headset.
The power rate is limited not only by capacity, but also by the maximum current the controller can take. The standard 100mA charging current for this lineup, although some new models support accelerated protocols. Using an adapter that is too powerful will not speed up the process, because the built-in protection will cut the excess power, but can lead to heating of the device.
⚠️ Warning: Using damaged cables or unstable voltage adapters may cause the power controller inside the case to fail, making charging impossible.
It is important to consider that over time, the capacity of Li-Po cells decreases and battery life decreases, but the charging time can, on the contrary, increase slightly due to the change in the internal resistance of the battery.
Charging time of different models of the AirDots series
Xiaomi AirDots has a range of different power-consumption features, and the base model, also known as Redmi AirDots, takes about 1.5 hours to fully charge the headphones themselves if they are completely discharged. The case for this model charges about 1 hour, provided you use a standard micro-USB cable.
More advanced versions, such as AirDots Pro or Air 2, often feature fast charging. In such devices, 10-15 minutes in a case can provide up to 2-3 hours of music listening, which is critical in emergency situations. Full recovery of case capacity in models with support for Qi or USB-C can take from 1.5 to 2 hours.
- 🎧 Redmi AirDots (Basic) – Headphones: 1.5 hours, case: 1 hour.
- 🔋 Mi True Wireless Earbuds Basic 2 – Headphones: 1.5 hours, case: 1.5 hours.
- ⚡ AirDots Pro – Headphones: 1 hour (with fast charging), case: 2 hours.
- 📦 Air 2S — Headphones: 1 hour, case: 2.5 hours (due to higher capacity).
It is worth noting that these time intervals are relevant when using certified cables and power supplies with output current 1A. When connected to a weak computer port or worn-out cable, the time can increase by 20-30%.
Case Charging Process and Status Indicators
Charging the charger case is the first step before using the headphones. To start the process, you need to connect the cable (micro-USB or USB-C depending on the model) to the corresponding connector on the case. On the front or inside of the case there is an LED indicator that reports the status of the battery.
When charging, the indicator usually turns red. When the capacity is restored to 100%, the color changes to white or the indicator goes out, depending on the modification of the firmware and hardware. If the indicator flashes red immediately after connection, this may indicate a deep discharge or a malfunction of the contact.
| Status of the indicator | Meaning | Action. |
|---|---|---|
| Burning red. | Charging is in progress. | Waiting for completion |
| Burning white. | 100% charge or close to it | You can turn it off. |
| Blinks red. | Low charge or error | Check the cable or leave the charge |
| It's not burning. | No contact or discharged to zero | Clean contacts, replace cable |
In some cases, especially after a long downtime, the indicator may not light up immediately, and in such a situation, you need to leave the device on charge for 15-20 minutes to activate the chemical processes in the battery.
☑️ Pre-charging check
Features of charging the headphones themselves in the case
Sam Sam Sammy. TWS-The headphones start charging automatically immediately after being placed in the case, provided that there is a charge in the case itself, contact is made through metal pens on the bottom of the headphones and the response pins inside the recess of the case. The purity of these contacts should be given special attention, as oxidation or contamination of the earwax can cause the process to become more complex.
The charge of the headphones takes less time than the charge of the case, due to their smaller capacity. Usually, 10-15 minutes after being placed in the case, the indicator on the case can change behavior (for example, go out or catch fire), signaling the start of energy intake. Full recovery usually takes about an hour to an hour and a half.
⚠️ Note: If you put headphones in the case, but the indicator does not respond and does not show charging, try to slightly press the headphones with your fingers or wipe the contacts with an alcohol napkin.
However, leaving the device under direct sunlight during charging is strictly not recommended, since overheating of lithium batteries reduces their life.
Why does the case warm up when charging?
Factors affecting charging speed
There are a number of external and internal factors that can significantly affect how quickly your Xiaomi AirDots recover power. One of the key parameters is ambient temperature. Lithium polymer batteries are sensitive to cold and heat: at low temperatures, internal resistance increases, and charging is slower or stops altogether.
The quality of the cable also plays a huge role: cheap cables without shielding and with thin veins have high resistance, which causes some of the energy to be lost as heat, without reaching the battery. Using the original cable or certified analogues labeled Ampere guarantees a stable speed.
- 🌡️ Air temperature (optimum) 10-30°C).
- 🔌 Power supply (recommended 5V 1A or 2A).
- 🔗 Quality and length USB-cable.
- 🔋 Degree of battery wear (older batteries charge longer).
Also, consider the power source. USB 2.0 port on your computer gives current up to 0.5A, which may not be enough to quickly charge the case, especially if it is discharged to zero.
💡
For maximum charging speed, use a short-length cable (up to 1 meter) and connect it directly to the outlet, bypassing it. USB-hubs.
Extending the life of the headphone battery
To keep your Xiaomi AirDots lasting and keeping the charge declared by the manufacturer for a long time, you must follow certain rules of operation. Deep discharge, when the device is turned off and lies for a long time without using, is harmful to battery chemistry. Try to put headphones on charging when the indicator shows about 20-30%.
Storing the device in a fully discharged state can lead to irreversible changes in the structure of the battery, after which it will stop taking charge.If you plan not to use the headphones for a long time, charge them up to 50-60% and remove them from the case, leaving in a cool place.
⚠️ Warning: Do not leave your headphones or case on charge overnight or for days at a time.Although controllers have overcharging protection, constant support for 100% charge under voltage accelerates degradation.
Regularly cleaning contacts with alcohol (isopropyl) helps maintain low resistance of the charging circuit, which has a positive effect on the efficiency of the process. Dirt and oxides can create "parasitic" resistance, causing heating and slowing current.
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The optimal charge level for long-term storage of lithium batteries is 50-60%. Full charging or full discharge during storage is harmful.
Frequent problems and their solution
Users often experience a situation where one earphone is charging and the other is not, or the case cannot see the device. 90% of the time, the problem is contamination of the contacts. Gas, dust or moisture can prevent circuit closure. The solution is simple: gently wipe the contacts with a cotton swab dipped in alcohol.
Another common problem is a "dormant" controller after a deep discharge. If the indicator does not light up after an hour of charging, try "rocking" the battery: plug and disconnect the cable several times in a row, then leave on charging for 2-3 hours, sometimes this helps to trigger a chemical reaction.
If neither method works, and the headphones don't charge even from different cables and blocks, the battery itself or the charge controller probably failed, which requires a replacement of the battery, which in a miniature AirDots case is a difficult technical task.