Documentation

Everything you need to know about using Battery Health Checker

Getting Started

Battery Health Checker is a free, open-source tool designed to help you monitor and understand your laptop's battery health. With just one click, you can view detailed information about your battery's condition, capacity, and performance.

Quick Start

  1. Download the latest version from our releases page
  2. Extract the ZIP file to any folder
  3. Run BatteryHealthChecker.exe
  4. View your battery health information instantly

Installation

Battery Health Checker is a portable application—no installation required. Simply download, extract, and run.

Download

Download the latest version (v0.9.0) from:

Verify Download

For security, you can verify the download using the SHA-256 checksum:

9e4e10a406edbae1122a44a6fa3c922e241a54726eb2d9d9c8cb5a288174af71

Extract and Run

  1. Right-click the downloaded ZIP file
  2. Select "Extract All..."
  3. Choose a destination folder
  4. Open the extracted folder
  5. Double-click BatteryHealthChecker.exe
Note

Windows SmartScreen may show a warning for downloaded applications. Click "More info" and then "Run anyway" to proceed.

Features

Battery Health Checker provides comprehensive battery information:

Battery Health Overview

  • Health Percentage: Overall battery health as a percentage
  • Design Capacity: Original battery capacity when new
  • Current Capacity: Maximum charge the battery can hold now
  • Wear Level: How much capacity has been lost

Charge Information

  • Current Charge Level: Percentage of current charge
  • Charging Status: Whether the battery is charging or discharging
  • Charge Rate: Current charging power in watts

Battery Details

  • Battery Name: Model name of your battery
  • Manufacturer: Who made the battery
  • Chemistry: Battery type (Li-Ion, LiPo, etc.)
  • Cycle Count: Number of full charge cycles completed

Understanding Metrics

Battery Health Percentage

This is calculated as: (Current Capacity / Design Capacity) × 100

  • 90-100%: Excellent - Battery is in great condition
  • 80-89%: Good - Normal wear for a used battery
  • 70-79%: Fair - Notable capacity loss
  • 60-69%: Poor - Consider replacement
  • Below 60%: Critical - Replacement recommended

Design Capacity vs. Current Capacity

Design Capacity is the battery's original maximum capacity as specified by the manufacturer, measured in mWh (milliwatt-hours).

Current Capacity (also called Full Charge Capacity) is the maximum charge your battery can currently hold. This decreases over time as the battery wears.

Cycle Count

A cycle count represents one full 0-100% charge cycle. Partial charges contribute proportionally (e.g., charging from 50% to 100% twice equals one cycle).

Most laptop batteries are designed for 300-500 cycles before reaching 80% capacity. Some premium batteries can handle 1000+ cycles.

Wear Level

Wear level shows how much capacity has been permanently lost: 100% - Health Percentage

For example, if your battery health is 85%, your wear level is 15%.

Troubleshooting

Application Won't Start

  • Ensure you have Windows 10 or later installed
  • Try running as Administrator (right-click → "Run as administrator")
  • Check that you extracted all files from the ZIP archive
  • Disable antivirus temporarily to rule out false positives

No Battery Detected

  • Verify you're using a laptop (desktops typically don't have batteries)
  • Check if the battery is properly connected
  • Restart your computer and try again
  • Check Device Manager for battery driver issues

Inaccurate Readings

  • Some laptops may not report all metrics accurately
  • Cycle count may show as 0 if not supported by the battery controller
  • Try calibrating your battery (full discharge then full charge)

Still Having Issues?

If you encounter problems not covered here, please open an issue on GitHub with details about your system and the problem.

System Requirements

  • Operating System: Windows 10 or Windows 11
  • Hardware: Any laptop with a battery
  • Disk Space: Less than 10 MB
  • Dependencies: None (standalone application)

Changelog

Version 0.9.0 (Current)

  • Initial public release
  • Basic battery health monitoring
  • Design and current capacity display
  • Cycle count tracking
  • Battery status information

Future Plans

  • Historical capacity tracking
  • Battery health notifications
  • Export reports to PDF/HTML
  • Multiple battery support

Ready to Check Your Battery?

Download Battery Health Checker now and get instant insights about your laptop's battery.

Download v0.9.0