What is the Battery Status API?

The Battery Status API is a web standard that allows websites and applications to access information about your device's battery. It provides real-time data about charge level, charging state, and estimated time remaining until full charge or complete discharge. This API is particularly useful for web applications that need to adapt their behavior based on available power, such as reducing features when battery is low or pausing intensive tasks when not charging.

Tool description

This tool displays your device's current battery status in real-time using the Battery Status API. It shows the battery percentage, whether the device is charging or discharging, and estimates how long until the battery is full (when charging) or empty (when discharging).

Features

  • Real-time battery level - View your current battery percentage with automatic updates
  • Charging status indicator - See whether your device is currently charging or running on battery
  • Time estimates - Get calculated estimates for time to full charge or time until discharge
  • Browser compatibility check - Automatically detects if your browser supports the Battery Status API
  • No installation required - Works directly in your web browser without any plugins

Use Cases

  • Battery monitoring - Quickly check your device's battery status without leaving your browser
  • Power management - Track battery drain rates and charging times
  • Development testing - Test how web applications respond to different battery states
  • Device diagnostics - Monitor battery behavior to identify potential hardware issues
  • Multi-device comparison - Compare battery performance across different devices

Technical Details

The tool uses the Battery Status API (also known as the Battery API), which is accessed through the navigator.getBattery() method. The API provides:

  • Level: Battery charge level (0.0 to 1.0, displayed as percentage)
  • Charging: Boolean indicating if device is plugged in
  • ChargingTime: Seconds until battery is fully charged (if charging)
  • DischargingTime: Seconds until battery is empty (if discharging)

Note: The Battery Status API is not supported in all browsers. It works best in Chromium-based browsers (Chrome, Edge, Opera) on Windows and Linux. Safari and Firefox have limited or no support. Mobile browsers may also have restrictions due to privacy concerns.