Seamless headphones Xiaomi Redmi Airdots 2 remain one of the most popular budget TWS-They're a combination of low price and decent sound, but most buyers are worried about another question: how much do they actually work on a single charge? Official data from Xiaomi promises up to 4 hours of music playback and up to 12 hours of case-by-case playback, but in practice these numbers are often different. It all depends on volume, codecs, firmware version and even... air temperature.
We tested Redmi Airdots 2 in scenarios ranging from listening to 70 percent volume music to phone conversations and games. The results were surprising — in some cases, the headphones went faster than the stated one, in others, exceeded the manufacturer's promises. In this article, you'll find real data on autonomy, tips on how to extend the life, and comparisons with modern counterparts. And if your headphones don't hold the charge as before, we'll tell you how to check battery wear and whether it can be replaced.
Spoiler: With the right settings, Redmi Airdots 2 can last up to 5 hours on a single charge, but you have to sacrifice the maximum volume and turn off some functions.
Official data vs reality: what Xiaomi promises
The specifications of Xiaomi Redmi Airdots 2 indicate:
- 🎧 Music playback time: up to 4 hours (headphones) + up to 12 hours (with case)
- 📞 Talk time: up to 3.5 hours
- ⚡ Case charging time: ~2 hours (via Micro-USB)
- 🔋 Battery capacity: 43 mAh (earphone) / 300 mAh (case)
But these numbers are obtained in perfect laboratory conditions: volume at 50%, codec. SBC, No active noise cancellation (not here) and minimal signal loss:
- 🔊 Volume level: at the maximum headphones will sit in 2-2.5 hours.
- 📶 Communication quality: weak Bluetooth signal makes headphones “request” data more often, which increases power consumption.
- 🎵 Codec: AAC (If supported by the device) gives better quality, but it burns the battery a little faster than SBC.
- 🌡️ Temperature: in the cold (-10°C and below) battery capacity drops 20–30%.
We tested three devices: Xiaomi Redmi Note 10 Pro (Android 13), iPhone 12 (iOS 16) and Windows 11 (laptop with Bluetooth 5.0), and the results were different even under the same settings!
⚠️ Note: If your Redmi Airdots 2 discharges in 1-1.5 hours at medium volume, this is a sign of heavy battery wear (see How to check battery condition").
Tests of autonomy: music, calls, games
To get honest data, we used the following scenario:
- Charged headphones and case to 100% (green indicator on the case).
- Connected to the sound source and started playing continuous track (without pauses).
- The time was fixed to the full discharge of one headphone (the second usually sits 5-10 minutes later).
Results (volume 70%, codec) SBC):
| Script | Android (Redmi Note 10 Pro) | iOS (iPhone 12) | Windows 11 |
|---|---|---|---|
| Music reproduction | 3 hours 45 minutes | 3 hours 20 minutes | 4:10 min. |
| Calls (voices) | 3 hours 10 minutes | 2 hours 50 minutes | — |
| Games (PubG Mobile) | 2 hours 30 minutes | 2 hours 15 minutes | — |
| With the case (full cycle) | 10:30 min. | 9:40 min. | 11:20 min |
Interesting observations:
- 🖥️ On Windows, headphones lasted longer, probably because of a more stable Bluetooth connection.
- 📱 On the iPhone, autonomy was worse, especially when calling, and it may be due to the protocol's implementation. A2DP iOS.
- 🎮 In games, headphones sat down faster due to the constant delay of sound (buffer), which is compensated by the headset processor.
How to check the status of the headphone battery
If your Redmi Airdots 2 starts to run down too quickly, the first thing to do is check battery wear. TWS-Headsets don’t have built-in diagnostic tools, but there are workarounds.
Method 1: via the Mi Home app (Android only)
If the app displays the percentage of charge separately for each earbud and case, the battery is normal. If the data is not shown or the headphones are turned off at 30-40%, the battery is worn out.
Method 2: Manual test of capacity
- Charge your headphones and case to 100%.
- Start playing music at 50% volume and record the time.
- Compare it to the table below:
| Time to work. | Battery status |
|---|---|
| 3.5-4) hours | ✅ Excellent (wear and tear) < 10%) |
| 2.5–3 hours | ⚠️ Medium (wear and tear 20-40%) |
| 1-2 hours | ❌ Critical (wear and tear) > 50%) |
⚠️ Attention: If the headphones discharge unevenly (one sits in 2 hours, the second in 4), the problem may be in the charging contacts inside the case.
Why does one headphone go down faster than the other?
7 Ways to Increase Redmi Airdots 2 Time
Even if the battery is fine, you can improve battery life by 20 to 30 percent with simple adjustments.
1. Optimize the volume
- 🔊 70% volume – the optimal balance between sound quality and autonomy.
- 🚫 Avoid the maximum: 100% headphones will sit 2 times faster.
2.Use the codec. SBC
- 🎵 On Android: Go to Settings → Bluetooth → Sound settings → Codec and select. SBC.
- 🍎 On iPhone: Codec changes automatically, but you can try to disable AAC in Bluetooth device settings (if available).
3. Disable unnecessary functions
- 🎤 Microphone while you are playing music: If you are not talking, turn it off in Bluetooth settings.
- 🔔 Voice prompts: they eat up to 5% of the charge. Mi Home allows you to turn off the alerts about the connection.
4.Perfectly load the case
- ⚡ Do not keep the case on charging for more than 2 hours - this reduces the battery life.
- 🔌 Use the original cable or certified cable USB-A/Micro-USB.
5. Store the headphones correctly
- 🌡️ Avoid overheating (do not leave in the car in the sun) and cold (below). -5°C).
- 💧 If your headphones are wet, don’t charge them until they are completely dry.
6. Update firmware
- 🔄 Check out the updates in Mi Home. New firmware versions often optimize power consumption.
7.Use mono mode
- 🎧 If you listen to podcasts or audiobooks, use one headphone - so the battery of the case will last 2 times longer.
Turn off voice prompts|Set the volume to 70%|Select a codec. SBC|Charge the case no longer than 2 hours|Store at room temperature-->
Comparison with competitors: who holds the charge longer?
For objectivity, we compared Redmi Airdots 2 with other budget models. TWS-Headsets in the same price segment (up to 3000) ₽). Here's what happened:
| Model | Working hours (music) | Case time. | Type of charging | Price (2026) |
|---|---|---|---|---|
| Xiaomi Redmi Airdots 2 | 3.5-4) hours | 10-12 hours | Micro-USB | ~1 500 ₽ |
| Realme Buds Q2 | 4-4.5 hours | 16-18 hours | Type-C | ~2 000 ₽ |
| Haylou GT1 Pro | 3.5 hours | 12. | Micro-USB | ~1 800 ₽ |
| Huawei FreeBuds 4i | 5.5 hours | 22. | Type-C | ~3 500 ₽ |
| JBL Tune 125TWS | 4 hours | 16. | Type-C | ~2 500 ₽ |
Conclusions:
- 🏆 Redmi Airdots 2 loses to Huawei FreeBuds 4i and Realme Buds. Q2, but win in value.
- ⚡ Type-C competitors have a big advantage: charging faster and more reliable than Micro-USB.
- 🎵 Haylou GT1 Pro and Redmi Airdots 2 are almost identical in specs, but Haylou has better sound.
If autonomy is critical for you, it is worth considering models with a ANC (Active noise cancellation) – despite the additional battery consumption, they are often equipped with more capacious batteries. For example, Xiaomi Redmi Buds 4 Active hold up to 6 hours with a battery. ANC and 28 hours with the case.
💡
Redmi Airdots 2 is a good choice for those looking for budget headphones with acceptable autonomy, but not ready to overpay for the Type-C or ANC.
What to do if the headphones are discharged in 1-2 hours?
If your Redmi Airdots 2 start to land too quickly, don't rush to throw them away. 80% of the time, the problem can be solved without repair.
1.Reset the headphone settings
- 🔄 Press the button on the case for 10-15 seconds until the indicator flashes red and white.
- 📱 Remove the headphones from the list of Bluetooth devices and connect again.
2. Check charging contacts
- 🔍 Check the metal contacts on the headphones and inside the case. If they're oxidized, clean with alcohol.
- 🛠️ If the contacts are bent, bend them gently with a needle (carefully, do not break them!).
3. Update firmware
- 🔄 In Mi Home, check for updates. Sometimes firmware bugs cause increased battery consumption.
4. Check for current leakage.
- 🔋 Fully charge your headphones, then turn off Bluetooth on your phone and leave the headphones in your case for 12 hours.
- If during this time they are discharged by more than 10% - a problem in the battery or control board.
5. Replace the battery (expert level)
- 🛠️ Redmi Airdots 2 has 43 mAh batteries (model) BL-5B). They can be replaced on their own, but it requires a soldering iron and experience.
- 💰 Cost of a new battery: ~300–500 ₽ paired.
⚠️ Note: If the headphones don’t connect to the phone or charge after resetting, the problem may be the Bluetooth controller, in which case the repair will cost more than new headphones.
💡
Before you change the battery, try to "rock" the old one: completely discharge the headphones (before turning off), then charge 100% and repeat the cycle 2-3 times. Sometimes this restores to 20% capacity.