Users of wireless headphones often face a situation when the gadget suddenly stops working due to a discharged battery. Owners of budget models from Xiaomi, such as Mi True Wireless Earbuds Basic, do not always immediately understand how the energy replenishment process in their devices works. The question of how to charge the Xiaomi AirDots case is one of the most frequent on technical support forums, and this is not accidental.
Specific design TWS-The headphones have two sources of energy: an integrated battery in each headphone and a more capacious battery in the charger case. The case is not only storage, but also a power bank for the liners themselves. Understanding the logic of this system is necessary for the device to last a long time and enjoy stable autonomy.
In this article, we will discuss the technical details of charging, decipher the meaning of light indicators and answer questions that often confuse owners: you will learn why the red indicator flashes and what to do if the case stopped seeing headphones. Proper operation will avoid premature failure of lithium polymer batteries.
The principle of operation of the charging system AirDots
Fundamentally, the process of energy recovery in the Xiaomi ecosystem is based on a cascading method. When you connect the charging case to the network, the current first goes to the battery built into it. Only after the case has accumulated a certain level of charge, or if it is already full, does the energy transfer to the headphones inserted inside begin, which is a basic principle that must be considered when diagnosing problems.
Inside the case are special contact pins (usually gilded or nickel pins) that must contact the feedback contacts on the headphones themselves. If this contact is not present, no power is transferred, even if the battery of the case is 100% charged. The design of the Mi True Wireless Earbuds Basic implies that the case is charged through the Micro-USB port located on the bottom edge or side, which is the standard for the budget segment.
⚠️ Warning: Never try to charge the headphones themselves separately from the case by connecting wires directly to them. AirDots design has no external ports on the liners themselves, and any attempts to provide current bypassing the case will lead to irreversible damage to the electronics.
There is also a nuance to the power controller, which automatically shuts off the current when the battery reaches its maximum, preventing overcharging, but leaving the device connected to the grid for several days unnecessarily is still not recommended, as this puts an extra strain on the BMS (Battery Management System).
Step-by-step instructions: how to charge the case
The charging process of the Xiaomi AirDots charging case is as simple as possible, but requires a certain sequence of actions to ensure that the indicators work correctly. First, make sure that you use a serviceable cable with a Micro-USB connector and a power adapter with a current of at least 1 Ampere (standard 5 Volts).
Insert the cable into the port on the case, and then connect the other end to the power source. It is important to note that the Micro-USB port does not have protection against improper connection, unlike Type-C, so you need to insert the plug carefully, without undue effort, so as not to damage the internal contacts. Once connected, you will see how the indicator will light up.
☑️ Checklist for proper charging
While the battery is being stored, the indicator on the front of the case will be lit in red, this is a normal mode of operation, signaling that current is entering the battery. Once the battery is fully charged, the red light will change to blue (in some revisions, the indicator simply goes out, but for classic AirDots is characterized by switching to blue).
The average time to fully charge a case is about 1.5-2 hours, and once the light is blue, the device can be disconnected from the network, and the case is ready to go and can charge the headphones themselves several times.
Charging the headphones inside the case
The Mi True Wireless Earbuds Basic headphones themselves charge exclusively from inside the case. The process requires that the case be at least partially charged. Put the headphones in the appropriate recesses until a characteristic click or tight fit. Magnets will help to correctly orient the inserts, but physical contact with the pins is mandatory.
Once the headphones are in the right position and touch the contacts, the red light on each of them will light up, which means that the process is underway. If the headphone indicators do not catch fire, perhaps the case is completely discharged or the contacts are dirty. In the fully charged state, the headphone indicators go out, which saves energy and does not shine in the dark.
- 🔋 Red indicator on the case - there is a charging case from the network.
- 🔵 Blue indicator on the case - the case is fully charged.
- 🔴 Red indicator on headphones – headphones are charged inside the case.
- ⚪ Indicators go out – the device is charged or turned off.
It's important to understand the difference between the case indication and the headphones themselves. The case shows its status through one shared LED, whereas each earpiece has its own miniature indicator. If you take out the headphones and put them in the case, but forget to close the lid, charging will still go, but the risk of losing contact is higher.
What to do if the indicators do not light up?
The charge time of the headphones themselves is usually less than the charge of the case, and is about 40-60 minutes, and then they can work offline from 3 to 4 hours, depending on the volume of playback.
Decoding indicators and their behavior
Light display is the main way a device communicates with a user. In the Xiaomi AirDots model, the logic of colors is quite simple, but has its own characteristics in different modes. Understanding these signals helps to quickly diagnose the state of the battery without connecting to a smartphone.
When the case is connected to the charger and the indicator is lit red, the active set of capacity goes. If the red color starts to flash, this may indicate a critically low charge level or a problem with the contact of the cable.
| Status of the device | Color of indicator | Mode of work |
|---|---|---|
| Charging the case | Red (permanent) | Connected to the network |
| Case loaded. | Blue (permanent) | Ready to work. |
| Charging headphones | Red (on headphones) | Inside the case |
| Pairing. | White/Red (Blinks) | Mode (Pairing) |
If the headphone lights flash quickly white and red (or just white depending on the firmware version), this means that the device is in search or phone connection mode, in which the battery is consumed faster, so you should not leave the headphones in search mode for long unnecessarily.
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If the case indicator flashes red when connecting to the charger, try replacing it. USB-Often the problem lies in the wire, which can conduct current to transmit data, but not cope with the current required to charge.
How long does AirDots charge?
Energy recovery time is an important parameter for planning the use of the gadget. For the Mi True Wireless Earbuds Basic, the manufacturer's stated characteristics may vary slightly in real-world conditions, and charging speed is affected by ambient temperature, the quality of the cable used and the residual capacity of the battery.
The case tends to charge the longest. When using a standard 1A adapter, the full cycle takes about 1.5 hours. If you use a more powerful power supply (for example, from a smartphone on the 2A), the speed may not increase significantly, since the charge controller in budget devices is often limited to an input current of 1 Amp for safety.
The headphones inside the case charge faster. They usually take about 1 hour to cycle from 0 to 100%. However, if the case is also discharged at this point, it will first charge itself, and then release energy to the headphones, which will increase the total waiting time.
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The best use case scenario is to charge the case overnight and recharge the headphones every time you don't use them, which will ensure maximum autonomy throughout the day.
And you have to consider that over time, lithium battery capacity decreases, and after a year of active use, the operating time can decrease by 15-20%, which is a natural physical process, so charging time data is relevant primarily for new devices.
Frequent problems and ways to solve them
Despite the reliability of the design, users sometimes face situations where the case stops charging or does not see the headphones. The most common reason is the oxidation of the contacts. During the process of carrying in the pocket, dust, pile and moisture enter the metal pins, which creates an insulating film.
To solve this problem, carefully wipe the contacts inside the case and on the headphones themselves with a cotton swab slightly soaked in alcohol or a special electronics cleaner. Let the contacts dry before re-installing the headphones. Often this returns functionality even to devices that were considered faulty.
Another problem is a dead case, and if the indicator doesn't light up even after a long connection to the grid, it's possible that the battery has gone into a deep discharge, so leave the device on charge for 30-60 minutes, even if the indication doesn't appear immediately, sometimes the controller needs time to "swing" the battery.
⚠️ Warning: If the case gets very hot during charging (it gets hot, not just warm), immediately disconnect it from the mains.This may indicate an internal short circuit or battery degradation, which is potentially dangerous.
There's also a problem when only one earpiece is charged, so check if both earbuds are sitting tight in their cells, and the magnets can attract the headphones, but if there's dirt in the groove, the contact may not be closed, and regular brushing of the case with a soft brush will help avoid this trouble.
Tips for extending battery life
To keep your Xiaomi AirDots as long as possible, you should stick to a few simple rules for using lithium polymer batteries: Do not let the full discharge “to zero” on a permanent basis. Try to put the case on charge when the indicator starts flashing red, signaling a low level.
Temperature is also critical. Don't leave your case with headphones in the direct sun, on the dashboard of your car in the summer, or near the heater, and the high temperatures irreversibly destroy the chemical structure of the battery, reducing its capacity.
- 🌡️ Avoid extreme temperatures (below 0)°C and above 45°C).
- 🔌 Use high-quality cables with thick veins.
- 🧹 Regularly clean contact areas from contamination.
- 🔋 Do not keep the device completely discharged for a long time.
If you plan to keep your headphones off for a long time (like going on vacation), charge your case and headphones to about 60-70% and turn them off. Periodically, every couple of months, check the charge level and recharge the device to prevent a deep discharge.