Battery Doctor (Battery Saver)

An application for saving battery power and approximating battery life


63 Votes

Battery Doctor Battery Saver is a battery-saving app designed to make your Android devices last longer without a charge.

If you use an Android smartphone or tablet on the go often, then you can appreciate the constant challenge of ensuring that a battery lasts until its next charge. Battery Doctor Battery Saver is an app that aims to help you ease that effort, and it works will practically all phones and tablets.

One of the app’s neatest features is one-tap optimization. A single tap lets the app identify and disable all apps and processes consuming a significant amount of power. This method lacks fine control, but it’s quite effective when you suddenly realize your running late.

The app also provides a more in-depth view of what’s draining your battery. You can then choose to disable apps on a per-app basis, but the information provided also helps you make long-term decisions as well as identify software issues. Another neat feature is a power-saving widget that gives you fast access to screen brightness, Wi-Fi, data and all of the other items users frequently disable or reconfigure in order to save power.

When you can charge, a Charger Master component gives you insight into how well and fast your device is charging. In addition, the more you use the app, the more it will learn about your device and usage, and it will be able to indicate how long your battery will last under a variety of theoretical scenarios.

Battery Doctor Battery Saver is an ad-supported free app. The ad approach is relatively non-intrusive, but some users complain that the developer allows third-party advertisements and that ads have become more intrusive with each iteration. An ad-free version would be a nice alternative.


  • One-tap optimization
  • Power-saving widget
  • Monitor charging status


  • No ad-free version

1. Known issues fixed

Potentially dangerous permissions

  • READ_EXTERNAL_STORAGE: Allows an application to read from external storage.
  • READ_PHONE_STATE: Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
  • WRITE_EXTERNAL_STORAGE: Allows an application to write to external storage.

Other permissions

  • ACCESS_NETWORK_STATE: Allows applications to access information about networks.
  • ACCESS_WIFI_STATE: Allows applications to access information about Wi-Fi networks.
  • BATTERY_STATS: Allows an application to collect battery statistics
  • BLUETOOTH: Allows applications to connect to paired bluetooth devices.
  • BLUETOOTH_ADMIN: Allows applications to discover and pair bluetooth devices.
  • CHANGE_NETWORK_STATE: Allows applications to change network connectivity state.
  • CHANGE_WIFI_STATE: Allows applications to change Wi-Fi connectivity state.
  • DISABLE_KEYGUARD: Allows applications to disable the keyguard if it is not secure.
  • EXPAND_STATUS_BAR: Allows an application to expand or collapse the status bar.
  • GET_TASKS: This constant was deprecated in API level 21. No longer enforced.
  • INSTALL_SHORTCUT: Allows an application to install a shortcut in Launcher.
  • INTERNET: Allows applications to open network sockets.
  • KILL_BACKGROUND_PROCESSES: Allows an application to call killBackgroundProcesses(String).
  • PACKAGE_USAGE_STATS: Allows an application to collect component usage statistics
  • READ_LOGS: Allows an application to read the low-level system log files.
  • READ_SYNC_SETTINGS: Allows applications to read the sync settings.
  • RECEIVE_BOOT_COMPLETED: Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting. If you don't request this permission, you will not receive the broadcast at that time. Though holding this permission does not have any security implications, it can have a negative impact on the user experience by increasing the amount of time it takes the system to start and allowing applications to have themselves running without the user being aware of them. As such, you must explicitly declare your use of this facility to make that visible to the user.
  • RESTART_PACKAGES: This constant was deprecated in API level 8. The restartPackage(String) API is no longer supported.
  • SYSTEM_ALERT_WINDOW: Allows an app to create windows using the type TYPE_SYSTEM_ALERT, shown on top of all other apps. Very few apps should use this permission; these windows are intended for system-level interaction with the user.
  • UNINSTALL_SHORTCUT: This permission is no longer supported.
  • VIBRATE: Allows access to the vibrator.
  • WAKE_LOCK: Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
  • WRITE_SETTINGS: Allows an application to read or write the system settings.
  • WRITE_SYNC_SETTINGS: Allows applications to write the sync settings.
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