Proper operation of portable acoustics directly affects sound quality and battery life. Many owners of budget but high-quality models, such as the Xiaomi Redmi Airdots 2, often wonder how long it is necessary to keep the device on charge. Incorrect charging can lead to rapid wear and tear of the battery or, conversely, to undercharge, which will affect the time of listening to music.
In this article, we will discuss in detail the specifications of the battery, the time intervals for a full recovery cycle and the nuances of the indicator operation. Understanding these processes will allow you to avoid common errors and significantly extend the life of your wireless headphones. We will consider not only standard scenarios, but also the features of operation in various conditions.
It's worth noting that the current lithium-polymer batteries used in this model require a certain approach. Unlike older nickel batteries, they don't need to be pumped in long cycles. However, knowing how much to charge the case and the headphones themselves is critical to maintaining their performance throughout their lifetime.
Technical characteristics of the battery
The Redmi Airdots 2 (also known as the Mi True Wireless Earbuds Basic S) features a 43mAh compact battery in each headphone.The charge case has a significantly more capacious 300mAh battery.This configuration allows the device to run for up to 4 hours offline, and the case provides up to 3-4 full additional charging cycles.
The time it takes to recover energy depends on the type of charger used and the condition of the cable. The standard charging cycle of the headphones themselves inside the case takes about 1.5 hours. It takes about 1.5-2 hours to fully charge the case without the headphones using a 1 Amp adapter.
It is important to consider that the rate of energy intake can vary. Using powerful power supplies from smartphones (for example, with Quick Charge support) will not speed up the process, since the power controller in the headphones limits the input current for safety.
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Use a cable from the complete set or a quality analog with a cross section sufficient to transmit current 1A to avoid energy loss and overheating of the wire.
Below is a table with an approximate charging time of the various components of the headset when using a standard USB-port (5V/1And):
| Component | Capacity | Charging time (0-100%) | Time to work. |
|---|---|---|---|
| Left earpiece | 43mAh | ~1.5 hours | ~4 hours |
| Right earpiece | 43mAh | ~1.5 hours | ~4 hours |
| Charging case. | 300mAh | ~2 hours | 12+ hours (total) |
| Full cycle (case + headphones) | 343mAh | ~2.5 - 3 hours | Up to 16. |
Indication of the charging process
Understanding the LED lights is key to monitoring battery health. The front of the charging case is an LED that changes color and mode depending on the current processes. When you connect the case to the network, the indicator lights up in red to signal the start of energy flow.
If the indicator is red, active charging. Once the battery of the case reaches full capacity, the LED will go out or light up white (depending on the specific revision of the board, but most often in the Airdots 2 model it simply goes out at 100%). Inside the case, in the headphone recesses, there are also micro-indicators.
When you put your headphones in your charging case, their internal lights turn red. When you finish the cycle, they go out. The LED light is the primary diagnostic tool. If it doesn't light up when you plug in the cable, check the contact in the Micro-USB connector or try replacing the wire.
⚠️ Warning: If the red light flashes or behaves outside the box (e.g., switches quickly from red to white), this may indicate a battery malfunction or overheating of the device.
The correct algorithm for first charging
There is a common misconception that new electronics need to be charged for 12 hours before first turning on. This rule was valid for nickel-cadmium batteries, but not for modern Li-Pol batteries. For Xiaomi Redmi Airdots 2, one full cycle is enough before the full charge indicator lights up.
When you first use it, you should completely discharge the case and headphones, and then put them on charge until they are fully saturated, which will help the power controller calibrate the charge levels, and you should not interrupt this process without absolutely having to get the system to correctly determine the capacity.
However, keeping the device on charge after the indicator has gone out makes no sense. The power controller automatically cuts the current, going into standby mode, but a constant connection to the network can create microdischarges that over time affect the battery life.
☑️ First charge of Redmi Airdots 2
How to extend the life of the battery
To keep your Xiaomi headphones as long as possible, avoid extreme battery states. Lithium polymer cells are most stable at 20% to 80% charge. While it's inconvenient to follow this rule daily, try not to bring the device to a full shutdown regularly.
Temperature is also critical: Do not leave the case with headphones in direct sunlight or in the cold. High temperatures accelerate the degradation of the battery's chemical composition, while low temperatures temporarily reduce its retardable capacity. Operating at room temperature is ideal.
If you plan to not use headphones for a long time (more than a month), leave the battery charged by about 50-60%. a fully discharged battery can go into a deep discharge from which it will not be possible to remove it, and 100% charge with prolonged downtime is also harmful to the chemistry of the element.
What is the memory effect and does Redmi Airdots 2 have it?
Common problems and their solution
Users often experience a case that doesn't charge the headphones, and 90 percent of the time, the problem is oxidation of the contacts, and the metal quilts of the headphones and the inside of the case accumulate dirt and oxides that prevent current from passing.
To solve this problem, gently wipe the contacts with a cotton swab, slightly soaked in alcohol or a special contact cleaner. Make sure the headphones sit tightly in the nests. Sometimes it helps to easily press the headphones with your fingers when you install them in the case - if the indicators are lit, then contact is restored.
Another problem is phantom charging, where the indicator is on but the battery is not gaining capacity, which may indicate battery wear or a faulty controller. If the charging time is longer than 4-5 hours and there is no full charge, a replacement of the battery is likely required.
⚠️ Warning: Never attempt to disassemble or pierce a lithium polymer battery, which may cause fire or chemical burns.
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Regular cleaning of contacts with alcohol every 1-2 months prevents 80% of problems with charging headphones in the case.