Are you curious to know the battery life on your Windows laptop?
On Windows, open a Command Prompt by going to Windows System in your programs and you will see Command prompt
Open it up and type powercfg /batteryreport, head to the path it the report has been saved to in your computer and open battery-report.html in your browser.
You will see from the report that my battery has been through 17 cycles
When you see several hundred you will know that your battery will not last as long.