How to charge Xiaomi Redmi Airdots 2: instructions with photos and tips

Xiaomi Redmi Airdots 2 wireless headphones have become one of the most popular accessories thanks to a combination of affordable price, high-quality sound and compact design. However, even such a simple device requires the right treatment — especially when it comes to charging. Failure to follow basic rules can lead to rapid battery wear, unstable operation or even breakdown.

In this article, we’ll take a look at all the nuances of Redmi Airdots 2: charging from the charger to the case indicator interpretation, how long it takes to fully charge, how to avoid typical errors, and what to do if the headphones stop charging, and secrets that will extend the battery life by 20-30% longer than standard.

If you just bought these headphones or you're having trouble charging, here's the answer to all the questions, even the ones you didn't know you had!

Technical characteristics of the Redmi Airdots 2 battery

Before we talk about charging, it’s worth understanding the “stuffing” of the device. Xiaomi Redmi Airdots 2 is equipped with lithium-polymer batteries that differ from traditional lithium-ion higher energy density and resistance to overheating.

• 🔋 Battery capacity of one headphone: 40 mAh
• 🔋 Battery capacity of the charging case: 300 mAh
• ⚡ Input voltage for case charging: 5V/300mA (maximum)
• ⏳ Time to fully charge the case: ~1.5 hours (using the original cable)
• 🎧 The operating time of headphones on one charge: up to 4 hours (at 50% volume)

It is important to understand that the actual running time depends on the volume level used by the codec (AAC/SBC) And even the ambient temperature. −10°The battery capacity may be reduced by 20-30%. If you listen to music at maximum volume, SBC, headphones will run out 2-2.5 hour.

The Redmi Airdots 2 case supports up to 4 full headphone charges (that is, up to 12-16 hours of battery life in total), but this figure gradually decreases after 200-300 charging cycles, which is how much lithium polymer batteries can withstand on average.

Charging methods: which one to choose?

The Redmi Airdots 2 charging case only supports wired charging through a USB Type-C connector. There is no wireless charging (Qi) or fast charging here - this is a budget model, and Xiaomi has saved on such chips. However, even with this connector there are nuances.

Here are all the possible ways to charge the case:

• 🔌 The original cable. + adapter 5V/1A (best-case)
• 📱 Smartphone Cable (for example, from Redmi Note) 10), But with an adapter, it's not more powerful. 5V/2A
• 💻 Port port USB on your computer/laptop (slower but safer)
• 🔋 Power Bank (with exit only) 5V, fast-charging!)

Critically, the Redmi Airdots 2 case does not support charging from sources with voltages above 5V or currents above 500mA. If you connect it to charging from a tablet (for example, 9V/2A), the battery controller may fail.

Cheap no-name cables are also avoided, often with poor contact or improper unpacking, leading to intermittent charging (cases charge, then not). The original Xiaomi cable is inexpensive but guaranteed to protect against such problems.

💡

If the case is not charged from the computer, try connecting it to the back. USB-port (they usually give more current than the front ones).

Step-by-step instructions: how to charge the case and headphones

The Redmi Airdots 2 charging process consists of two steps: first, the case itself is charged, and then the headphones inside it, and let's go through both options in detail.

Charging the case

1. Connect the Type-C cable to the case (the connector is on the bottom).
2. The other end of the cable is inserted into the power source (adapter, computer or power bank).
3. The indicator on the case will light up red (if the battery is discharged) or white (if there is a charge).
4. Wait until the indicator goes out – this means that the case is 100% charged.

Full charge time of the case from 0% to 100%:

Charging headphones in the case

The headphones charge automatically as soon as you put them in the case, but there are a few rules:

Place both headphones in the nest of the case (left and right have magnetic tags) | Make sure that the contacts on the headphones and in the case are clean (without dust and oxidation) | Close the case cover - this will activate charging | The indicator on the case will flash white (if the headphones start charging) | Do not remove the headphones until full charging (the indicator on the headphones will go out)-->

If the indicator on the case does not flash white when placing headphones, check:

• 🔌 Are the headphones inserted correctly (magnets should "attract»).
• 🧹 Clean contacts (wipe them with a dry cotton swab).
• 🔋 Is there enough charge in the case (if the case is discharged, it will not be able to charge the headphones).

💡

The headphones only charge when the case is closed! If the lid is open, charging will not start, even if the indicator is on.

Charging Indicators: What Colors Mean

Redmi Airdots 2 has only one LED, but it can display 4 different states.

• 🔴 Red constant: case discharged (0-20% charge) and connected to power.
• ⚪ White constant: case charged (20-99% charge).
• ⚪ White flashing: headphones are charged inside the case (the case can be disconnected from the power supply).
• 🖤 Indicator is off: the case is fully charged (100%) or disconnected from the power supply.

If the light flashes red, it's a sign of a malfunction.

• The case is connected to a power source with inappropriate parameters (e.g. 9V instead of 5V).
• The Type-C cable or connector is damaged.
• The charging controller is out of order (repair required).

The headphones themselves also have indicators, but they only show the connection status, not the charge level:

• 🔴 Red flashing: headphones in pairing mode.
• ⚪ White flashing: headphones connected to the device.

Typical charging errors and how to avoid them

Even experienced users sometimes make mistakes that shorten the life of the Redmi Airdots 2 battery.

⚠️ Note: If you leave the case on charging more 24 Lithium polymer batteries don't like to be connected to power, which accelerates degradation of the battery. 15-20%.

• ⚡ Use of "fast" charging (Quick Charge, VOOC The case does not support high currents and this can burn the controller.
• 🌡️ Charging at extreme temperatures (below) 0°C or higher 40°C) Optimal range: 10-30°C.
• 🔌 Connection to unstable sources (e.g, USB-No power hubs or old computers, which leads to intermittent charging.
• 🧲 Storage of a discharged case for longer than a month. Lithium polymer batteries deteriorate when deep discharge.

Another common problem is the uneven charging of the headphones, for example, one earphone charges to 100%, and the second one only charges to 60%.

• Contaminated contacts on one of the headphones.
• A loose fit of the headphone in the case nest (magnets weakened).
• Battery imbalances (if one headphone is used more often than the other)

To avoid this, periodically change the headphones in the case (for example, once a week) and clean the contacts with a soft brush.

How to extend the life of Redmi Airdots 2 battery

The average battery life in Redmi Airdots 2 is about 2-3 years when used actively, but if you follow these tips, you can extend it by 30-50%:

• 🔄 Do not discharge the case "to zero." It is optimal to start charging when 20-30% leftover.
• ☀️ Avoid direct sunlight. Overheating accelerates battery degradation.
• 🔌 Turn the case off after full charge. Don't leave it overnight.
• 📵 Keep the case charged. 40-60%, If you don’t use it for more than a week.
• 🧼 Clean your contacts once a month with an alcohol napkin (without excessive moisture!).

If you notice that the case has been charging for much longer (for example, instead of 1.5 hours - 3-4 hours), this is a sign of battery wear.

• Try calibration: completely discharge the case, and then charge to 100% without interruptions.
• Contact the service for battery replacement (costs inexpensive, ~500-800 rubles).

Interesting fact: if you use Redmi Airdots 2 only at 50% volume and charge them from a quality adapter, the battery will last up to 500-600 cycles instead of the standard 300.

What to do if Redmi Airdots 2 is not charged

If the case or the headphones stop charging, don't throw them away. 80 percent of the time, the problem is solved by yourself.

1. Check the cable and adapter: Connect the case to another power source. Try charging another device with this cable (for example, a smartphone).
2. Clear the contacts: Wipe the Type-C connector and contacts in the case/earphones with a cotton swab dipped in alcohol. Make sure the contacts are not oxidized (green coating).

Reset the case settings

1. Put the headphones in the case.


2 Press and hold the button on the case for 15 seconds (the indicator will flash red and white).




3. Remove the headphones and try to recharge.

Check the headphones separately

• Try charging each headphone separately (put only one in the case).
• If one is charging and the other is not, the problem is with the contacts or the headphone battery.

⚠️ Warning: If the case stopped turning on after the reset, the fuse on the board may have burned, in which case only repairs at the service center will help.

If none of these methods worked, the problem is likely to be:

• 🔋 Case/earphone battery (replacement required).
• 🔌 Charging controller (burned out due to voltage surge).
• 🧲 Magnetic contacts (weakened or shifted).

The cost of repairs in informal services usually does not exceed 1000-1500 rubles. But if headphones are guaranteed, contact the authorized service Xiaomi - they will be replaced for free.

FAQ: Frequent questions about charging Redmi Airdots 2