Have you noticed that during long conversations Xiaomi runs out too quickly? battery goes down 30-50% per hour of call, and sometimes the phone even overheats or turns off? The problem is familiar to many owners of smartphones of this brand - from budget Redmi to flagship Mi and POCO. The reasons can lie in the software settings, and in the physical wear of the battery or communication module.
In this article, we’ll look at 7 working ways to increase call times, from simple tweaks in the Settings menu to radical measures like battery replacement or firmware. You’ll learn what parameters eat up your charge during a conversation, how to check battery health without root, and why even the new Xiaomi 14 can discharge faster than the old Redmi Note 8 Pro. All instructions are relevant for devices on MIUI 12-14 and HyperOS, including models with support for 5G and VoLTE.
1. Network Settings Optimization: Why VoLTE and 5G Are Eating the Battery
The main charge eater during calls is the communication module. Modern Xiaomi smartphones support up to 5 simultaneously working antennas (2G/3G/4G/5G + Wi-Fi/Bluetooth), and each of them consumes energy. This is especially noticeable when using VoLTE (voice over 4G) or 5G - these technologies provide better communication quality, but increase the load on the processor and battery.
What can be done:
- 📶 Turn it off. 5G, If you don't need it, go to Settings. → SIM-maps and mobile networks → Preferred network type and select 4G (This will reduce the energy consumption of 15-20% during calls.
- 🔄 Enable VoLTE for the main one only SIM. If you have two SIM cards, disable VoLTE for the second in Settings → SIM-map → [choose SIM] → Use VoLTE.
- 🌐 Check the signal strength if the network is weak (1-2 dividing, the phone spends more energy maintaining the connection. Try switching to another operator or using a signal repeater.
Important: On some models (e.g., the POCO F5 or Xiaomi 13T), a 5G shutdown can result in an automatic 3G switch with a weak 4G signal, which puts the battery even more down. Check this manually after changing the settings.
Battery Diagnosis: How to Know if the Battery is Worth
If your Xiaomi is 1.5-2 years old, the problem may be a degraded battery. Lithium polymer batteries lose up to 20% of capacity after 300-500 charging cycles, and when used intensively (for example, frequent calls) wear accelerates.
- Enter the combination in the Phone app: ##4636## → select Battery Information.
- If you look at Battery Health, you have to change the battery if it's below 80%.
- Alternatively, install the AccuBattery app (available on Google Play) and check the wear schedule.
| Battery health level | Status. | Recommendations |
|---|---|---|
| 90-100% | Excellent. | Optimize your settings, the battery is not the problem. |
| 80-89% | Satisfactory | Watch the temperature, avoid full discharges |
| 70-79% | Critical | Prepare to be replaced, the working time has decreased by 30-40% |
| Down below 70% | Emergency. | Replacement is mandatory, risk of sudden shutdown |
⚠️ Warning: If the phone is hotter than 45°C (can be checked by AccuBattery), which is not only a sign of battery wear, but also of possible problems with the power module or antenna.
3. Software tweaks: Hidden MIUI settings to save charge
MIUI And HyperOS has hidden features that help reduce power consumption during calls, and most users don't know about them, but they can increase conversation times on the Internet. 25-30%:
- ⚡ Turn off background activity for apps: Settings → Annexes → Application management → [select] → Permits → Background activity (turn off for everyone except messengers).
- 🔇 Reduce the sound quality in calls: In Settings → Sound and vibration → Select the sound quality in the calls instead of the standard HD.
- 🛡️ Activate Power Saving Mode for Calls: C Settings → Battery → Power saving modes enable Super Energy Saving and add Phone app to exceptions.
Turn off 5G (if not needed)| Set standard sound quality |Add Phone to power saving exclusions | Check battery temperature after 30 minutes of talk-->
⚠️ Note: Some firmware (e.g. Global) ROM Redmi Note 11 shutdown HD-This can cause noise cancellation to be lost during calls. Check this beforehand by calling another phone in a noisy place.
Hardware solutions: battery replacement and other radical measures
If the software methods didn't work, it's time to look at hardware improvements.
- 🔋 Replacement of the battery with the original (the article can be found on the Xiaomi website on the phone model). 1 500 before 4 000 Important: Use only batteries marked with the MDY-XX (for Redmi or DM-XX (for Mi/POCO).
- 📡 Replacement of the communication module (antenna block) is relevant if the phone does not catch the network well and constantly switches between the two. 3G/4G. Price from 2 000 ruble.
- 🔧 Cleaning the connector SIM-Sometimes oxidation of contacts leads to poor signaling and increased power consumption.
How to verify the authenticity of Xiaomi battery?
💡 If you decide to replace the battery yourself, use heat glue to fix the new battery instead of double-sided tape.This will improve heat sink and reduce the risk of overheating during long calls.
5. Alternative methods: from external batteries to firmware
If none of the above methods worked, consider non-standard solutions:
- 🔌 Use Power Bank with passto (e.g. Xiaomi Mi Power Bank 3 Pro) to connect it during long conversations, which will not only extend the operating time, but also reduce the load on the internal battery.
- 📱 Install custom firmware (e.g. Pixel Experience or LineageOS). Some firmware is better optimized than others. MIUI, and increase in 10-15% Careful: this will void the warranty.
- 🎧 Go to the headset. Calls through Bluetooth headphones (e.g. Xiaomi Buds) 4 Pro) or wired headset reduce the load on the phone communication module on the 20-30%.
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Before you run custom software, backup it with TWRP or OrangeFox, especially for models with a locked bootloader (such as the Xiaomi 12T or Redmi K50).
6. Frequent mistakes that shorten conversation time
Many Xiaomi users themselves are degrading call times without even knowing it. TOP-5 Mistakes that should be avoided:
- 🚫 Using metal cases, they shield the signal, causing the phone to increase the transmission power.
- 🔄 Constant switching between SIM-Each switch resets the connection and wastes additional energy to reconnect.
- 📲 Ignoring firmware updates in newer versions MIUI often optimize the power consumption of the communication module. MIUI 14.0.5 for Redmi Note 12 fixed bug with increased consumption on VoLTE calls.
- ☀️ Charging your phone in the sun or in your car, overheating your battery while charging reduces your battery life. 10-15% six months.
- 🔊 At full volume, the phone spends up to 5% of its charge per hour just to amplify the sound.
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The most common mistake is using unoriginal chargers: Cheap power supplies (especially those with 5V/1A output) not only slow the phone to charge, but can also damage the power controller, which will subsequently lead to a quick discharge during calls.