Click the battery icon in the taskbar and click on More power options . Alternatively, click on the Start button then click on the Control Panel. You can find Power Options in the Systems and Security or Hardware and Sound section of the Control Panel.- In the Power Options window click on Change Plan Settings to modify your power settings.
- In the Edit Plan Settings window you can modify settings for when your laptop is on battery power and when it is plugged in. The lower your display brightness and power saving settings the longer your battery life will be. Set these settings to the lowest levels you are comfortable with on battery to maximize the amount of time you can use your laptop without it being plugged in.