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BatteryVoltageDisplay

BatteryVoltageDisplay shows battery voltage in the system status bar
BatteryVoltageDisplay shows Android phone’s real-time battery voltage. The information is always visible in an icon in the status bar and in a notification, even while you use other apps.

Practical uses of monitoring battery voltage:

🔋 Check battery real health
Spot signs of battery degradation. Watch for sudden or irregular voltage drops—these are early signs that the battery is degrading.

🔌 Catch bad chargers or cables
During charging, voltage should rise smoothly (e.g., 3.7 V → 4.2 V). If it stays flat or jumps irregularly, the cable or adapter is likely defective.

💀 Avoid unexpected shutdowns
Monitoring voltage lets you see the exact point where the phone shuts down from low battery. Helping you avoid surprises like the device shutting down at 30% charge.

📈 Save money on unnecessary battery replacement
Monitor battery’s voltage to know its true health and decide a battery replacement only when it is actually needed.

⚠️ Prolong battery lifespan
Batteries experience high stress when charged to their maximum voltage, which often happens before the charge indicator shows 100%. By monitoring voltage, you can unplug your phone at the optimal point to reduce stress and extend battery life.

🔎 Evaluate aftermarket replacement battery capacity
Quickly know a replacement battery’s quaity. A good battery holds stable voltage under load, while a poor-quality battery drops quickly under use and spikes sharply when charging.


The Battery Voltage Display app is a tool for anyone who wants detailed insights into their Android smartphone’s battery health.


Key Features:

- User-Friendly Interface: Designed with simplicity in mind, ensuring easy navigation and quick access to vital battery data.
- Automatic Startup Support: Enables continuous monitoring without requiring manual app relaunches after a reboot.
- Resource Efficiency: The app operates with minimal RAM usage, ensuring it does not interfere with system performance.
- No Hidden Processes: Unlike many background apps, it does not run covert services, preventing unnecessary battery drain.
- Manual Exit Functionality: Allows users to completely exit the app with a single button press, ensuring full control over system resources.
- Ad-Free Experience: The app is entirely free to use without any intrusive advertisements disrupting the user experience.
- Wide Compatibility: Works seamlessly on devices running Android 8 and newer versions.

Created by Eugen Barilyuk EB43 https://eb43.github.io

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.2 (3) suggested Added on Nov 01, 2025

    This version requires Android 8.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.example.timenotification.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 4.6 MiB PGP Signature | Build Log

  • Version 1.1 (2) - Added on Sep 13, 2025

    This version requires Android 8.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.example.timenotification.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 4.6 MiB PGP Signature | Build Log

  • Version 1.0 (1) - Added on Aug 27, 2025

    This version requires Android 4.4 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.example.timenotification.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 4.7 MiB PGP Signature | Build Log