Have you ever noticed that on some smartphones battery percentage it is displayed directly on the screen, while on others there is only an icon with a level? Or did the usual indicator suddenly disappear after the update? This article will help you figure out how manually check the exact percentage of charge on any device running Android —from budget Xiaomi Redmi to flagship Samsung Galaxy.

We will look at not only obvious methods like system settings, but also hidden functions that work even when the standard indicator is broken. We’ll also find out why sometimes percentage in settings and real charge they don’t match - and what to do about it. Are you ready? Then let's get started!

1. Standard method: notification panel and settings

The easiest method is to look at notification panel (aka “curtain”). On most modern smartphones, the charge percentage is displayed there by default. If it is not there:

  • 📱 Swipe down from the top edge of the screen to open the panel.
  • ⚙️ Tap on settings gear (or "Edit" in some firmware).
  • 🔍 Find the option Show battery percentage (may be called Indicator batteries or Battery icon style).

On Samsung the path looks like this: Settings → Notifications → Status bar → Battery icon styleOn Xiaomi — Settings → Screen → Status bar → Show battery percentage.

⚠️ Attention: On some firmwares (for example, ColorOS from Oppo/Realme) the option is hidden in Settings → Battery → Battery icon. If you don’t find it, use the search in the settings (magnifying glass icon).

If the option is enabled, but the percentage is still not shown, try reboot your smartphone - sometimes this helps to return the indicator. Also check if you have installed a theme that hides the numbers (relevant). to Xiaomi and Huawei).

📊 What brand of your smartphone?
Samsung
Xiaomi/Redmi/Poco
Huawei/Honor
Realme/Oppo
Other

2. Battery widget on the main screen

You don’t want to go into the settings. every time? Add battery widget to the main screen. This is convenient if you need to constantly monitor the charge - for example, while traveling or shooting videos.

Instructions:

  1. Press and hold empty space on the main screen screen.
  2. Select Widgets (or Add widget).
  3. Find a widget with the name Battery, Charge level or System settings.
  4. Drag it to the screen and adjust the size (if supported).

On Samsung the widget is called Good Lock (must be installed from Galaxy Store), to Pixel — At a Glance. If there is no standard widget, use third-party applications like Battery Widget Reborn or 3C Battery Monitor.

💡

On some firmware (for example, MIUI) the battery widget shows not only the percentage, but also the battery temperature and time until complete discharge. Useful for diagnostics!

3. Hidden codes for the engineering menu

If standard methods do not work (for example, after resetting or updating), you can use service codesThey open the engineering menu, where it is displayed real charge level directly from the battery controller . rounding, as in the interface.

Here are the universal codes for most smartphones:

  • 📞 ##4636## — opens the menu Testing, where in section Battery information shows the exact percentage and temperature.
  • 🔋 ##2846579## —works on Huawei/Honor (transition: ProjectMenu → Background Settings → Battery Status).
  • ⚡ *#0228# — for Samsung (shows voltage, temperature and percentage).

How to enter codes:

  1. Open the application Phone.
  2. Enter the code as a phone number.
  3. Click on the call - the menu will open automatically.
⚠️ Attention: Do not change other parameters in the engineering menu if you do not know their purpose! This may lead to unstable operation of the smartphone or even battery damage.
What to do if the code does not work?

If nothing happens after entering the code, then the manufacturer has blocked access. An alternative is to use applications like MTK Engineering Mode (for MediaTek processors) or Shortcut Master for search. hidden menus.

4. Applications for monitoring the battery

Third-party utilities not only show the charge percentage, but also provide advanced statistics: time to complete discharge, number of charging cycles, battery wear We tested the top solutions - here are the best:

Application Features Suitable for
AccuBattery Shows actual battery capacity, wear, charging/discharging speed All Android versions
3C Battery Monitor Displays voltage, temperature, charge history Android 5.0+
GSam Battery Monitor Analyzes battery consumption by application Android 4.4+
Battery HD Minimalistic widget with percentage and operating time All versions

How use:

  1. Install the application from Google Play.
  2. Give access to battery data (if prompted).
  3. Open the main menu - the charge percentage will be displayed in real time.

In AccuBattery, for example, there is function Battery health, which shows how much the capacity has decreased since the time of purchase. If the value is lower 80%, it’s time to change the battery.

Open the “Health” tab|Wait for calibration to complete (2-3 cycles are needed charging)|Look at the value of "Calculated capacity"|Compare with the nameplate capacity (indicated on the battery sticker)-->

5. ADB commands for advanced users

If you like to "dig deeper", you can get battery data through ADB (Android Debug Bridge). This method is suitable for diagnostics or when the smartphone does not respond to touches, but connects to the PC.

Instructions:

  1. Install ADB on your computer (download Platform Tools from the website Google).
  2. Enable USB debugging on your smartphone: Settings → About phone → Build number (press 7 times), then Settings → System → For developers → USB debugging.
  3. Connect the phone to the PC and run the command:
adb shell dumpsys battery

In the response, find the lines:

  • level: 75 — current charge percentage.
  • voltage: 3850 — voltage in millivolts.
  • temperature: 280 — temperature (divide by 10 to get °C).

This method shows raw data from the battery controller, without rounding and “embellishment” with firmware. Useful if you suspect that the smartphone is lying about the charge level.

⚠️ Attention: Using ADB requires caution. Do not execute other commands from the Internet - this may disturb the operation of the system.

6 Why the percentage in the settings and the actual charge may differ

Have you ever noticed that the smartphone suddenly turns off when charged? Or vice versa - after charging to 100% it quickly drops to 80%? This is not always the fault of the battery: 15-20% charge? Or vice versa - after charging to 100% it quickly drops to 80%? It's not always the battery's fault. Here are the main reasons for the discrepancies:

  • 🔄 Battery calibration: Over time, the controller “forgets” the real capacity. discharge-charge (0% → 100% without interruption).
  • 📉 Battery wear: After 300-500 cycles, the capacity decreases by 20-30%, and 100% in the settings is no longer equal to the rated capacity.
  • 🤖 Firmware optimization: Some manufacturers (for example, OnePlus) artificially lower the upper charge limit to 80-90% to extend battery life.
  • 🌡️ Temperature: When overheated or cold, the controller can block part of the capacity.

How to check Is your smartphone lying?

  1. Charge the phone to 100% and unplug it.
  2. Use it in normal mode until it turns off.
  3. Turn it on and see what the percentage was before turning it off. If less than 5%, everything is fine. If 10% or higher, calibration or battery replacement is needed.
💡

If the difference between the displayed and actual charge exceeds 15%, this is a sign of battery wear or controller failure. In the first case, only replacement will help, in the second - flashing or resetting the settings.

7. Alternative methods (if nothing works)

There are situations when the smartphone does not turn on, but you need to find out the charge level - for example, before selling or repairing. Here's what you can do:

  • 🔌 Charger with indicator: Some power supplies (for example, Baseus or Anker) show the charge percentage on their screen.
  • 🔋 External power bank with display: Connect the phone to a power bank - many models display the input voltage and approximate level.
  • 🛠️ Multimeter: For advanced users. Connect the probes to the battery contacts (red to “+”, black to “-”) and measure the voltage:
    • 4.2V — 100%
    • 3.7V — ~50%
    • 3.2V - 0% (critical level)

If the phone turns on, but the screen does not work, connect it to Smart TV or monitor via USB-C → HDMI adapter. On some devices (for example Samsung DeX), the interface is duplicated on an external display, where you can see the charge percentage.

Frequently asked questions

Is it possible to find out the charge percentage when the phone is turned off?

No, if the smartphone is completely turned off, you can get accurate data it is impossible. However, some models (for example, Samsung with function Always On Display) show the charge when you briefly press the power button. You can also use charger with display —it will approximately show the level.

Why does the percentage jump after replacing the battery (for example, from 50% to 20%)?

This is a normal phenomenon after replacing the battery. The reason is uncalibrated controller. To fix:

  1. Completely discharge the phone before turning it off.
  2. Charge to 100% without interruptions (preferably with the original charger).
  3. Repeat the cycle 2-3 times.

If the problem persists, it is possible that a low-quality battery is installed or the cable is damaged.

How to display the charge percentage on the lock screen?

On most smartphones, this option is enabled along with display on the notification panel. But there are nuances:

  • On Samsung: Settings → Lock screen → Widgets → Battery.
  • On Xiaomi: Settings → Lock screen → Advanced → Show charge batteries.
  • On Pixel: the option is turned on automatically when you activate the percentage in the curtain.

If there is no option, use the widget from Good Lock (for Samsung) or third-party applications like Lock Screen Battery.

Is it true that displaying the charge percentage drains the battery faster?

No, that's a myth. Displaying numbers on the screen consumes less than 0.1% charge per hour this is disproportionately small compared to background processes. Much more energy is spent on:

  • Constant network search (especially in the subway).
  • Background synchronization of applications.
  • Screen brightness above 50%.

So feel free to turn on the percentage display - it does not affect battery life.

Is it possible to reset battery calibration data without completely discharging it?

Yes, but this requires root access or ADB. Method for advanced users:

  1. Connect the phone to the PC and open ADB Shell.
  2. Run the command: 
    adb shell dumpsys batterystats --reset
  3. Reboot the device.

⚠️ Warning: This method resets all battery consumption statisticsincluding wear data. Use only if you are confident in your actions!