Usable Power Mode in Xiaomi: Hidden Mode That Prolongs Battery Life

Have you ever noticed that Xiaomi's smartphone suddenly starts to last longer on a single charge, even though nothing has changed in the settings? Or vice versa - the battery goes down faster than usual, although the applications are the same? Most likely, the little-known mode Usable Power Mode, which Xiaomi quietly added to the latest MIUI firmware, is not advertised in the settings menu, but it actively affects how your phone uses energy.

In this article, we’ll look at what Usable Power Mode really is (spoiler: it’s not just “power saving mode”), how it’s related to battery degradation, and why Xiaomi is hiding it from users. You’ll learn how to check if your Redmi, POCO, or Mi is on, how to force it to activate or disable it, and what pitfalls await experimenting with these settings, and real-world tests that show how much more per cent your phone’s life is in this mode.

What is Usable Power Mode: A Technical Explanation

Usable Power Mode is a software limit on maximum battery capacity that Xiaomi has implemented in MIUI since version 12.5+ to protect batteries from premature wear. Unlike the standard “power saving mode” that simply reduces performance, the Usable Power Mode physically locks battery power at 80-90% (depending on the model), even if you plug your phone into charging for the night.

Why is this done? Lithium-ion batteries (which are found in 99% of Xiaomi smartphones) degrade faster when they are constantly kept at 100% charge. Research shows that a battery that never charges above 80% loses only ~20% of capacity in 500 cycles, whereas charging to 100% will lose ~40%. Xiaomi decided to automate this process, but — as often happens — without users’ knowledge.

  • 🔋 Charge limit: The battery does not charge above 80-90% (exact threshold depends on model and version) MIUI).
  • ⚡ Dynamic Adjustment: Mode can be switched on/off automatically depending on battery temperature and usage history.
  • 📉 Hidden status: Most firmware does not have an explicit switch – the mode works “in the background".
  • 🛠️ Performance impact: The maximum processor frequency may decrease slightly when activated (5–10%).

It's important to understand that the Usable Power Mode is not a bug or a firmware bug, it's a deliberate decision by Xiaomi to extend the battery life, but many users encounter it by accident when the phone suddenly stops charging to 100% and they begin to suspect a charger or battery malfunction.

📊 You know that there is a Usable Power Mode in Xiaomi?
Yeah, I used it.
I heard, but I haven't.
I only found out now.
I'm not interested.

How to check if Usable Power Mode is enabled on your Xiaomi

Since Xiaomi hasn’t added a separate switch for this mode to its settings, there are two ways to check its status: through a hidden menu of engineering settings or through third-party apps.

Method 1: Through the Engineering Menu (without root)

This method works on most Xiaomi, Redmi and POCO models with MIUI 12.5 and later. You don't need root rights, but you need to type in a special code:

  1. Open the Phone app.
  2. Enter the combination: ##4636## (Testing menu opens).
  3. Go to the Battery Information tab.
  4. If you see the charge level, if it is below 100% (e.g. 88%) and your phone has been connected to charging for a long time, then the Usable Power Mode is active.

💡

If the ##4636## combination doesn’t work, try entering it through the Dial app in incognito mode (without a SIM card).

Method 2: Using the AccuBattery application

The AccuBattery app (available on Google Play) not only shows the actual wear of the battery, but also tracks the battery limits.

  1. Open AccuBattery and go to the Charging tab.
  2. If the charge breaks by 80-90%, it is a sign of activation of the Usable Power Mode.
  3. In the Battery Health section, check the charge limit line (if any).

Note that some Xiaomi models (such as the Xiaomi 13 Pro or Redmi Note 12 Pro+) may hide the mode information even in the engineering menu, in which case only manual shutdown will help (more about this in the next section).

What to do if the engineering menu is not opened?
If the ##4636### code doesn’t work, it could mean that: 1) your firmware has been modified (castom). 2 Xiaomi has blocked access to the engineering menu for your model (relevant to some flagships from 2023-2026). 3 Developer mode with limitations is enabled. In this case, try to use ADB-commands (instruction below) or third-party utilities such as MTK Engineering Mode (for devices on MediaTek chips).

How to turn on or off Usable Power Mode manually

If you want to control this mode yourself (like turning it off before a long trip where you need 100% charge), there are several ways. Importantly, turning off the mode can speed up battery wear, especially if you often keep your phone charging.

Method 1: ADB (no root, but requires PC)

This is the most reliable way, which works on most Xiaomi devices: you will need a computer with ADB drivers installed and the developer mode on the phone is turned on.

  1. Turn on Developer Mode: Go to Settings → About Phone → MIUI version and tap 7 times on the build number.
  2. Return to Settings → Additional → For developers and activate Debugging over USB.
  3. Connect your phone to your PC and execute in the command line: adb shell su -c "settings put global battery_charge_limit 100" (This will disable the restriction; to enable the replacement 100 on 80 or 90).
  4. Reboot the phone.

Install drivers ADB PC-only|Enable the developer mode on Xiaomi|Activate debugging by USB|Connect your phone to the original cable|Check the connection of the team `adb devices`-->

Method 2: Hidden MIUI settings (requires root)

If you have root access, you can change the settings directly in the system files:

  1. Install any file manager with root support (such as Root Explorer).
  2. Cross the path: /data/property/persist.sys.battery_charge_limit.
  3. Open the file and change the value to: 0 – no limits (charge up to 100%); 80 or 90 – enable Usable Power Mode.

Save the changes and restart the phone.

⚠️ Warning: Changing system files without root can cause firmware to crash. If the phone doesn't turn on after editing, you'll need to flash it through Fastboot.

Method 3: Through the Battery and Performance app (for some models)

On individual devices (such as the Xiaomi 12T or POCO F4 GT), the option can be hidden in standard settings:

  1. Go to Settings → Battery and Performance → Battery Settings
  2. Slip on the three dots in the upper right corner and select Additional.
  3. Find the Battery Limit (or Usable Power Mode) and set the desired value.

To avoid unexpected activation:

  1. Avoid charging your phone in hot or cold conditions (such as in the sun or outdoors in winter).
  2. Don’t keep your phone charging all night – use smart timer outlets.
  3. Periodically (once every 1-2 months) discharge the battery to 0% and charge up to 100% for calibration.

⚠️ Note: If the Usable Power Mode is activated spontaneously even under normal conditions, it may indicate a malfunction of the battery or charge controller.In this case, check the battery health through AccuBattery or contact the service center.

Usable Power Mode vs. Standard Power Saving Mode: What’s the Difference

Many users confuse Usable Power Mode with the usual "power saving mode" in MIUI.

ParameterUsable Power ModeEnergy saving regime
PurposeProtecting the battery from wearIncreased operating time from one charge
How it worksLimits maximum charge (80-90%)Reduces productivity, disables background processes
Impact on autonomyReduces the working time (less capacity)Increases working time (less spending)
Automatic onsetYes (temperature, wear, etc.)No (only by hand)
Impact on productivityMinimum (5-7%)Significant (up to 30%)

The key difference is that the Usable Power Mode affects battery power, and the energy-saving mode affects discharge, and you can (and sometimes you need to) use them together.

  • 🔋 Power Usable Power Mode 90% to Protect Your Battery.
  • ⚡ Activate the power saving mode when the charge drops below 20% to reach the socket.

This approach will allow you to extend the life of the battery, and not to be left without communication at a critical moment.

Xiaomi models that support Usable Power Mode (full list)

Usable Power Mode is not available on all Xiaomi devices, and it appeared in MIUI 12.5 and is used in firmware for models released after 2021. Below is the full list of supported devices (as of 2026):

Flagship models (Xiaomi series)

  • Xiaomi 14 / 14 Pro / 14 Ultra
  • Xiaomi 13 / 13 Pro / 13 Lite / 13T / 13T Pro
  • Xiaomi 12 / 12 Pro / 12S / 12S Ultra / 12T / 12T Pro
  • Xiaomi 11 / 11 Pro / 11 Ultra / 11T / 11T Pro
  • Xiaomi Mix 4 / Mix Fold / Mix Fold 2 / Mix Fold 3

Mid-segment (Redmi Note Series)

  • Redmi Note 13 / 13 Pro / 13 Pro+
  • Redmi Note 12 / 12 Pro / 12 Pro+ / 12S / 12T
  • Redmi Note 11 / 11 Pro / 11 Pro+ / 11S / 11T
  • Redmi Note 10/10 Pro/10S (with MIUI 13+ only)

Budget and game models (POCO series)

  • POCO F5 / F5 Pro
  • POCO X5 / X5 Pro / X5 GT
  • POCO F4 / F4 GT
  • POCO X4 / X4 Pro / X4 GT
  • POCO M6/M6 Pro (with MIUI 14 only)

If your model isn't on the list, it doesn't mean it's not at all, it can be hidden deeper in the firmware. To check for support, try entering it. ADB-team:

adb shell settings list global | grep battery

If there is a line in the conclusion battery_charge_limit, So the regime is being maintained.

⚠️ Note: Some models (e.g. Redmi) 9A or POCO M3) The Usable Power Mode may not work properly due to outdated charge controllers, in which case it is best not to interfere with settings so as not to damage the battery.

Frequent questions about Usable Power Mode in Xiaomi

❓ Can you turn off the Usable Power Mode completely so that the battery can be charged to 100%?
Yes, but the way it works depends on the model. ADB-Adb shell settings put global battery_charge_limit 100. However, on some flagships (for example, Xiaomi) 14 Ultra mode can be activated again automatically when the battery overheats or wears out, in which case only disabling through editing system files (root required) will help).
❓ Usable Power Mode is Harmful to the Battery?
No, it's the opposite, it extends battery life, and limiting battery power to 80 to 90 percent reduces battery load and slows down degradation, but if you often discharge your phone to zero, it's best to sometimes charge it to 100 percent to calibrate your controller.
❓ Why does the phone still not charge to 100 after turning off Usable Power Mode%?
This may be due to: Battery malfunction (wear and tear) >30% Failure of the charge controller (service diagnostics required) Residual settings in the firmware (try resetting the battery settings via Settings) → Annexes → Application management → Three points. → Reset the settings).
❓ Is there any other Usable Power Mode in the world?
Yes, there are many brands that have similar features: Samsung: Protect Battery (limited by 85%); Apple: Optimized Battery Charging (charge up to 80% with pause); OnePlus/Oppo/Realme: Battery Health Engine; Google Pixel: Adaptive Charging; Xiaomi’s difference is that the mode often works hidden, without notifying the user.
❓ How to Reset Usable Power Mode Settings to Factory?
If you experimented with the mode and want to return everything as it was: Open Settings → Memory. → Clean and select Deep Clean. Go to Settings. → Annexes → Application management → Three points. → Reset the settings. Run the command through ADB: adb shell settings delete global battery_charge_limit Restart the phone. After that, the mode will work automatically by default.