Why is Xiaomi’s battery running out fast?
Xiaomi smartphone owners often face the problem of fast battery discharge, especially after 1-2 years of use. The reasons can be both software (background processes, unoptimized software) and hardware (battery wear, overheating).
Modern Xiaomi smartphones (Redmi, POCO, Mi series) use lithium polymer batteries that lose up to 20% of capacity after 500 charging cycles. But even on new devices, the battery can run out in a few hours due to incorrect settings. We tested the methods on Xiaomi 13 Pro, Redmi Note 12 and POCO X5 models — the results below.
1. MIUI optimization to save charge
The MIUI branded shell offers built-in tools to extend battery life. Start by checking settings in Settings → Battery.
- 🔋 Turn on the "Super economy" mode - limits background activity and reduces the brightness to 30%. Save up 15-20% day-load.
- ⚙️ Disable Auto-Run Applications through Settings → Annexes → Autostart control.
- 📱 Activate Adaptive Charging (available on Xiaomi) 12T and newer) - slows down the wear of the battery during prolonged connection to charging.
Focus on Settings → Battery → Battery Use. This shows the apps that consume the most power, like Facebook or TikTok, which can use up to 30% of its charge in the background.
2. adjust the brightness and refresh rate of the screen
The display is the main charge eater. AMOLED-screens (e.g. Xiaomi 13 Ultra) are recommended:
- 🌓 Set adaptive brightness at the level 50-60% (manually through settings → Display. → Brightness).
- 🔄 Reduce the frequency of the update to 60 Hz (if available) 90/120/144 Hz. POCO F5 gives +2 hour.
- 🌑 Include a dark theme (Settings) → Display. → Dark theme – saves up to 10% of charge on AMOLED.
A critical mistake many users make is using maximum brightness (100%) in sunlight. This reduces the time of operation by 1.5-2 times! Instead, turn on the Read mode in the notification curtain - it optimizes the color gamut for savings.
| Screen settings | Savings in charge (per hour) | Models where it works |
|---|---|---|
| Brightness 50% vs 100% | +1.5-2 hours | All models. |
| 60 Hz vs 120 Hz | +1.5 hours | POCO F4/F5, Redmi Note 12 Pro+ |
| Dark theme (AMOLED) | +0.5-1 hour | Xiaomi 12/13, Black Shark 5 |
3. Management of background processes and applications
Many apps continue to work in the background even when you're not using them.
- Open Settings → Applications → Application Management.
- Select an app (such as WhatsApp or Instagram).
- Click on "Limit background activity" and "Disable autostart".
For advanced users: Use the adb command to completely disable background activity:
adb shell cmd appops set <package_name> RUN_ANY_IN_BACKGROUND denyReplace. <package_name> to the package name (e.g. com.facebook.katana for Facebook).
Disable Auto-Run for 5+ applications |
Limit background activity of messengers |
Remove unused applications|
Checking through Settings → Battery → Use-->
⚠️ Note: Do not limit system processes (e.g. com.miui.securitycenter) and this may cause disruptions. MIUI.
4. Disabling unnecessary communication functions
Wi-Fi, Bluetooth, NFC and GPS are all powered even when they're in standby mode.
- 📶 Turn off "Search for Wi-Fi in the background" in Settings → Wi-Fi → Additionally.
- 📍 Use "Geolocation Savings Mode" (Settings) → Location → Regime. → Saving charge).
- 🔵 Turn off Bluetooth and NFC through the notification curtain if you do not use.
In the models with 5G (for example, Xiaomi 12T Pro) switching to 4G low-signal 5G It can save up to 25 percent of your charge per day. → SIM-maps and mobile networks → Preferred type of network.
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If you rarely use mobile Internet, turn on In-Air mode overnight, which will completely turn off the communication modules and save up to 5% of charge in 8 hours.
5. Battery calibration and statistics reset
Sometimes the MIUI system misrepresents the charge level (e.g. jumps from 30% to 1%) and this is solved by calibrating:
- Charge your phone to 100% and keep charging for another 1 hour.
- Turn off the power and discharge to 0% (until it turns off).
- Charge again to 100% without interruption.
- Reset battery statistics through Settings → Battery. → ⋮ → Resetting statistics.
For non-removable battery devices (all models after 2018), calibration should be done every 3 months, and on older models (for example, Redmi 4X) – once a month.
⚠️ Note: Do not use the "battery calibration" apps from Google Play. They do not work and may contain malicious code. The only safe way is the manual procedure described above.
Replacement of the battery: when is it necessary?
If all the software methods don't work, the problem may be the physical wear and tear of the battery, and the signs are that it's time to change the battery.
- ⚡ The phone's emptying on 50% post 1-2 hourly.
- 🔥 The body is heated when charging or in simple.
- 📉 B Settings → Battery. → The state of the container shows less than 80% of the original.
- 🔌 Charging is interrupted or requires a specific cable position.
Cost of battery replacement in Xiaomi service centers (2026):
| Model | Cost (₽) | Capacity of new battery (mAh) |
|---|---|---|
| Redmi Note 11/12 | 2 500 — 3 200 | 5 000 |
| Xiaomi 12/13 Lite | 3 800 — 4 500 | 4 500 |
| POCO X5 Pro | 3 000 — 3 700 | 5 000 |
| Black Shark 5 | 4 200 — 5 000 | 4 520 |
How to check the originality of the battery?
7. Myths about saving charge, which should not be believed
There are a lot of tips on the Internet that not only don't help, but also harm the battery.
- ❌ "We need to unload the phone before 0% Every time, it reduces the life of lithium polymer batteries: 20-80%.
- ❌ "Closing apps through the multitasking menu saves charge" — MIUI It optimizes the background processes itself. Manual closure can increase the flow rate.
- ❌ "Charging at night spoils the battery" - modern Xiaomi smartphones automatically turn off power when they reach 100".
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The only proven way to extend the life of the battery is to avoid extreme temperatures (below 0°C and above 40°C) and not keep the phone charging for more than 12 hours at a time.