Owners of the popular budget model Xiaomi EarBuds Basic 2s often wonder about the speed of charge recovery, especially when the device is discharged at the most inopportune moment. Understanding the time frame is necessary for proper operation, as it allows you to schedule the use of the gadget throughout the day without unexpected pauses.
The process of replenishing energy in compact TWS-The headphones have their own characteristics related to battery capacity and the power of the charging case. Unlike smartphones, it uses lower-power currents, which extends the life of tiny battery cells, but increases the waiting time.
In this article, we will discuss in detail how long it takes to fully charge the Xiaomi EarBuds Basic 2s, how to read the indicators correctly and what factors can slow down this process. The full charge cycle of the headphones themselves takes exactly 1.5 hours (90 minutes), while the case charges about 2.5 hours.
Technical characteristics and battery capacity
To understand the charging speed, you need to refer to the technical specifications of the device: the Xiaomi EarBuds Basic 2s model is equipped with 43 mAh batteries each, and the charging case has a 300 mAh battery.
Charging is done through a Micro-USB connector, which is located on the lower edge of the case. Using this standard instead of the more modern Type-C imposes certain restrictions on the maximum current that can enter the device, usually at currents around 250-500 mA, which determines the duration of the cycle.
It is important to consider that the lithium-polymer batteries used in these headphones have a charge curve. Initially, the voltage increases rapidly, but the last 20% of the capacity is dialed much slower due to the operation of the power controller, which prevents overheating and bloating.
- 🔋 The capacity of one headphone is 43 mAh, which provides up to 4-5 listening-hours.
- 🔌 Case holds. 300 MC and is able to fully charge headphones approximately 3-4 once.
- ⚡ The input current is limited by the design of the Micro-USB port, which excludes the use of fast charging technologies.
⚠️ Note: Do not use chargers from powerful smartphones with support for Quick Charge or Power Delivery without limiting current, as the headphone controller may incorrectly determine the profile and heat up.
Charging time for headphones and case
As mentioned, the full energy recovery cycle for the liners takes about an hour and a half. If you put the discharged headphones in the case and plug it into the network, the indicator on the front panel will show an active process, during which time the cells saturate to 100%.
The charger case, which acts as a power bank for headphones, charges longer. It takes 2 to 2.5 hours to fully restore the capacity of the case itself, which can vary depending on the quality of the cable and the power supply you use.
It is worth noting that the Xiaomi EarBuds Basic 2s does not have a fast charging feature, where 10 minutes on the base gives several hours of operation, so it is recommended to put the device on charge in advance, for example, at night or while you are at work.
If the case is completely discharged, it will first give energy to the headphones (if they are inside), and then start charging itself. In such a combined scenario, the total time spent at the outlet can increase to 3 hours.
The table below gives indicative time values for different battery states:
| Status of the device | Charging time. | Indication |
|---|---|---|
| Headphones (0-100%) | 1.5 hours | Red -> Turned off |
| Case (0-100%) | 2.5 hours | Red -> Turned off |
| Headphones (20-80%) | ~50 minutes. | Red. |
| Full cycle (case + headphones) | ~3 hours | Blinking/burning |
Indication of the charging process
Understanding the LED light signals helps the user control the status of the battery. On the front of the charging case Xiaomi EarBuds Basic 2s is a single LED, which changes its behavior depending on the charging stage.
When you connect the cable to the network, the indicator lights up in red, which means that current enters the device. If both earphones are on inside the case, the red light signals that they are charging, and if the headphones are already full and the case is not, the indicator will still burn in red, indicating that the case is charging.
Once the device reaches 100% charge, the LED goes out. Lack of glow when the cable is connected is a normal sign of full charging, not a malfunction. Many users mistakenly think that the indicator should be lit green or blue, but this model uses only red to indicate the process.
- 🔴 Burning red: there is an active charge (earphones or case).
- ⚪ Does not burn: the device is fully charged or the cable is not connected.
- 🔴 Flashing red: connection error, low current, or battery failure.
💡
If the indicator does not light up when connecting the cable, try replacing it. USB-cable – often the problem lies in the damage to the wire, not in the headphones themselves.
Factors affecting charging speed
The rate of energy recovery is not a constant, it depends on a lot of external and internal factors, first of all, it's ambient temperature. Lithium batteries are extremely sensitive to cold and heat. At low temperatures, the chemical reactions inside slow down, and charging can take much longer or not start at all.
The second important factor is the quality of the power supply. USB-The computer port usually occurs slower than the network adapter, since the PC port often produces a current of only 0.5 A. Network power units with a power of 1A or 2A provide a more stable process.
The state of the Micro-USB connector itself also affects the port. Over time, dust and pile can accumulate inside the port from pockets, which worsens contact, which leads to increased resistance and, as a result, to a drop in current and slow charging.
Battery wear is a natural process. After 500 recharge cycles, the capacity drops, but paradoxically, the charging time can decrease as the physical amount of energy to be pumped becomes smaller, but it will be worse to keep the charge.
⚠️ Warning: Do not leave your headphones charged in direct sunlight or on heaters. Overheating above 45 degrees Celsius can irreversibly damage the battery's chemical makeup.
Proper operation for longevity battery
To Xiaomi EarBuds Basic 2s last a long time and their charging time does not increase with time, you should adhere to the rules of operation. Deep discharge is harmful to lithium polymer batteries. Try not to bring the device to a state where it completely stops turning on.
The optimal storage and use mode is a charge in the range of 20% to 80%. Although modern controllers protect against overcharging, being on the wire 24/7 is also not recommended. Once the indicator is gone, it is better to turn off the cable.
Use only serviceable cables. Cheap cables without shielding can interfere with the claimed current strength. For Micro-USB devices, this is especially critical, since the connector is physically smaller and the contacts are thinner than in Type-C.
☑️ Checking the battery's health
If you plan to not use the headphones for a long time (for example, a month or more), charge them to about 60% and remove them from the case.Storing completely discharged can lead to a deep discharge, after which the controller will block the ability to charge.
Frequent problems and their solution
Users sometimes experience a situation where the headphones are not charging or the process is endless. Often the problem lies in the oxidation of the contact areas on the headphones themselves, because they are inside the case, they can get moisture or earwax.
The solution is simple: gently wipe the golden contacts on the legs of the headphones with a dry soft cloth or cotton swab slightly soaked in alcohol, and also clean the response pins inside the charging case. This restores normal current.
Another problem is the case battery is dead, and if the case was long dead, its controller could go into a deep sleep, so leave it on charge for a few hours, even if the indicator doesn't light up right away, and sometimes it takes a shock to activate it.
What if one headphone is charging and the other is not?
If nothing works, try resetting your headphones to factory settings. This usually requires pressing the control buttons on both headphones (or touch zone) for 10-15 seconds until they are in the case, and then placing them again for charging.
Comparison with competitors and analogues
The Xiaomi EarBuds Basic 2s charging time of 1.5 hours is the average for the budget segment.Some competitors using newer protocols can charge in 1 hour, but often this is achieved by using more powerful currents, which theoretically reduces the overall battery life.
Wireless charging models typically charge longer via cable because of the design of the receiver inside the case, and Xiaomi’s wired Micro-USB connection remains a more predictable and faster way to recover power.
It's important to note that charging speed isn't the only thing. The energy efficiency of the Realtek chip that's installed in these headphones allows them to last up to 5 hours, which at 1.5 hours of charging gives you a great balance. You don't have to look for an outlet every two hours.
💡
The optimal ratio of charging time (1.5 h) and operating time (4-5 h) makes the model convenient for daily use without the need to carry a power bank.
Conclusion and final recommendations
To sum up, the Xiaomi EarBuds Basic 2s requires about 1.5 hours to fully charge the liners themselves and up to 2.5 hours for the charging case, which corresponds to the specifications of the device and ensures comfortable use.
Compliance with simple rules such as using quality cables, cleaning contacts and avoiding extreme temperatures will keep the battery in good condition throughout the life of the gadget.
Remember that lithium batteries are consumables and their degradation is inevitable, but proper operation can significantly slow this process. TWS-They will make you sound good for a long time.