Secret Trick increase your laptop Battery Life. Do you know that your laptop or PC has been running for days or even weeks even when you after you shutdown? Press Control Shift Escape key In the Task Manager click on Performance. You will see the uptime of your computer in the bottom. This tells how long your Laptop has been running. For my case it is up by 14 hours even though I just turned on my laptop. This is because every time you turn your laptop off, by pressing the power button. Your lap