How much are Xiaomi Redmi Airdots 2: full guide with timings and life hacks charged

Xiaomi Redmi Airdots 2 wireless headphones remain among the most popular budget headphones TWS-And the main advantages of these models are compactness, decent sound quality, and of course, autonomy, but with charging, users often have questions: Why does one headphone charge longer than another, can you use a case as a powerbank, and what to do if the indicator flashes red.

Many people mistakenly think that the charging time of Redmi Airdots 2 depends only on the battery capacity. In fact, a lot of factors affect the process: from the firmware version to the ambient temperature. For example, at +5 ° C, the battery can charge 30% slower than at room temperature. And if you use a non-original cable or adapter, the time can double. Next, a detailed analysis with numbers, tables and proven tips.

By the way, Redmi Airdots 2 owners often confuse two concepts: the charging time of the headphones in the case and the charging time of the case itself. These are fundamentally different processes! In the first case, we are talking about replenishing the energy of miniature batteries in the plugs themselves, in the second case, about recharging the built-in battery of the case, which then feeds the headphones.

How long is the Redmi Airdots 2 charged?

According to the manufacturer’s specifications, Xiaomi Redmi Airdots 2 have the following charging characteristics:

• 🔋 Capacity of one headphone: 40 mAh
• 🔋 Case capacity: 300 mAh
• ⚡ Time to fully charge headphones in the case: ~1.5 hours (0 to 100%)
• ⚡ Case charging time from the grid: ~2 hours (via Micro-USB)

But these numbers are the perfect scenario when using the original cable and output adapter. 5V/1A. In practice, the time may be different, for example, if you connect the case to the USB-port of the laptop (where current is often limited) 0.5A), charging will take up to 3 And if you use a fast adapter on the 5V/2A, case-load 1 hour 20 minutes, but it will not speed up the charging of the headphones inside.

The Redmi Airdots 2 doesn't support fast charging technology, and even if you plug them into an 18W or 30W adapter, the current is limited to 1A. This is for the safety of small batteries.

Note that in a case, the headphones only charge when it's powered or it's charged enough, and if the case is discharged to 0%, you need to charge it first, and then it starts to give power to the headphones.

Why One Headphone Is Charging Longer Than Another: 5 Reasons

The difference in charging time between the left and right earphones is a common problem.

• 🔌 Bad contact in the case. Check the metal contacts on the headphones and inside the case - they may have oxidized or become contaminated.
• 🔋 Different levels of discharge. If one earphone has been used longer, it will charge longer.
• 🤖 Firmware failure: Sometimes the power controller on one of the headphones freezes. Reset helps (see section below).
• 🌡️ Overheating: If one earphone gets hot (for example, lying in the sun), the system can artificially slow down charging.
• 🔄 Different software. After the firmware update, the headphones can behave differently.

To diagnose the problem, do the following:

1. Take both headphones out of the case and completely discharge them (let's work before disconnecting).
2. Put them back in the case and watch the indicators. If one of the headphones does not flash red (means it does not charge), the problem is in the contacts or the battery.
3. Try to change the headphones in the case, if the "slow" headphone in another slot is charging normally, the contact in the case is to blame.

⚠️ Note: If the difference in charging time exceeds 30 minutes, this may indicate a degradation of the battery in one of the headphones, in which case only a replacement of the battery (cost) will help. ~500-800 rubles in the service center).

How to speed up charging: 7 working ways

While Redmi Airdots 2 doesn’t support fast charging, there are several ways to reduce battery recharge times:

1.Use the original cable and adapter

Non-original accessories often have increased resistance, which reduces current. the original cable from Xiaomi is labeled MDY-08-EG or MDY-11-EG.

2. Charge at room temperature

Ideal range: +15°C to +25°C. At lower temperatures, the chemical processes in the battery slow down. Do not put the case on the battery or under direct sunlight!

3. Turn off the headphones before charging

If the headphones are active (for example, connected to a phone), they spend energy maintaining the connection.

1. Get the headphones out of the case.


2. Press the touch buttons on both headphones for 5 seconds




3. Wait for the double beep (disconnection)

4. Charge the case without headphones

If you need to quickly replenish the charge of the case (for example, before a trip), take out the headphones - so the case will charge 20-30% faster.

5.Use.Use. USB-port 3.0

USB 3.0 ports (usually blue) provide more current than USB 2.0. Connect the case to such ports on a PC or charger.

6.Discharge the headphones to 0% before charging

Lithium polymer batteries (like those in Airdots 2) are better at handling full-discharge charging, which also helps calibrate the power controller.

7. Update firmware

Older versions of the software could have power management bugs. Check the firmware version in the Mi Home app (if the headphones are connected to a Xiaomi smartphone).

Use the original 5V/1A| cable and adapter

Charge at +15..+25°C|

Turn off the headphones before charging |

Use it. USB-port 3.0|

Discharge headphones to 0% before charging-->

Charging indicators: what do colors and flashes mean

Redmi Airdots 2 has two LEDs:

• 🔴 Red - on the case (state of charging the case and headphones)
• 🔵 Blue/white on headphones (connection state)

Decoding of case indicators:

If the case indicator flashes red quickly (2 times per second), it is an error signal.

• 🔌 The cable or adapter is damaged.
• 💧 Wetness in the Micro-USB connector
• 🔋 Failed charging controller in the case
• 🌡️ The case overheated (let's cool for 10-15 minutes)

⚠️ Warning: If the Redmi Airdots 2 case is not charging at all (the indicator is not responding), try to "resuscitate" it like this: plug it into charging, then press the button on the case for 15 seconds.

How much do you hold a charge: real autonomy vs claimed

The manufacturer claims up to 4 hours of continuous playback on a single charge and up to 12 hours of case-based charging, but in practice, the numbers depend on the use case:

Real tests of autonomy (at 70% volume):

• 🎵 Music (AAC-codec: 3 hours 40 minutes
• 🗣️ Telephone conversations: 3 hours 15 minutes
• 🎮 Games (low delay): 3 hours
• 📞 Call waiting (no sound): up to 5 hours

With the case, you get 3-4 full recharge cycles, which is about 12 to 14 hours of battery life in total.

• 🔊 The higher the volume, the faster the headphones discharge, and at the maximum, the running time is reduced to 2.5 hours.
• 🌡️ In the cold (-10°C) autonomy falls by 30–40%.
• 📶 Unstable Bluetooth connection (for example, in the subway) increases battery consumption.
• 🔄 Frequent connections/disconnections from devices reduce the operating time.

💡

To extend the life of the battery, once a month completely discharge and charge the headphones to 100%, which helps calibrate the controller and prevents the "memory effect".

How to Reset Headphones If They Are Not Charging

If Redmi Airdots 2 refuses to charge or connect, a full reset will help.

1. Put both headphones in the case and close the lid.
2. Connect the case to the charger (the indicator should burn red).
3. Press the button on the case for 20 seconds until the indicator flashes red and white.
4. Turn the case off from charging, pull out the headphones and press the touch buttons on both for 10 seconds (until you hear the shutdown sound).
5. Put the headphones back in the case and let them charge for 10-15 minutes.

After reset, the headphones will go back to the factory settings, and they'll have to be reconnected to the phone.

1. Get the headphones out of the case.


2. Press the buttons on both for 3 seconds (until the blue indicator flashes)




3 Turn on Bluetooth on your phone and select "Redmi Airdots_R" from the list of devices

⚠️ Attention: If the headphones are still not charging after reset, the problem may be in the power controller, in which case only repairs in the service center will help.

💡

Resetting headphones helps in 80% of cases of problems with charging or connection, if it does not help, it is the fault of the hardware (battery, controller or contacts).

Frequent questions about charging Redmi Airdots 2