Steps to improve your Laptop battery life
Step - 1
Dim the Bright LCD Screen – Turn down the brightness level of your laptop screen to the lowest value possible. Similarly, lower the screen resolution and color depth as they again put stress on the display card and therefore consume additional power of your battery.
When your laptop running on battery
Hold 
press 
Step - 2
Turn off
Step - 3Disable Background Processes – You could have several maintenance related processes running on your hard-drive which can be turned off temporarily. Examples include the desktop search software that's configured to index new files on the fly or any IM clients sitting in the system tray or any scheduled tasks that auto-run at pre-defined intervals
Step - 4
Keep the use of tools in the notification bar to a minimum - Try to minimize your CPU's usage. Look at the notification area of the taskbar and close any tools (or utilities) that are not necessary. Often, these tools are installed on the computer when you first receive it. The notification bar, shown below, is on the bottom right of your computer desktop.
Step - 5
Clean your laptop's air vents regularly - Your battery works most efficiently when the operating temperature of your laptop is lower. To avoid overheating and improve thermal efficiency you need to avoid dust build-up in air vents. If your air vents are dust free the cooling fan would run at much lower speed there by reducing the load on your laptop battery, blow dust out of air vents once a week, you can select your time interval depending upon your usage.
Step - 6
Hibernate not standby - Although placing a laptop in standby mode saves some power and you can instantly resume where you left off, it doesn't save anywhere as much power as the hibernate function does. Hibernating a PC will actually save your PC's state as it is, and completely shut itself down.
Step - 7
Choose the Right Power Setting - In the Control Panel go to "Power Options". In the "Power schemes" drop down list, be sure to select either the "Portable/Laptop" or "Max Battery" option.
Step - 8
Don't multitask - Do one thing at a time when you're on battery. Rather than working on a spreadsheet, letting your email client run in the background and listening to your latest set of MP3's, set your mind to one thing only. If you don't you'll only drain out your batteries before anything gets completed.
Step - 9
Keep operating temperature down - Your laptop operates more efficiently when it's cooler. Clean out your air vents with a cloth or keyboard cleaner.
Step - 10
Avoid running programs from CD/DVD drive - CD/DVD drives are expensive when it comes to power consumption when compared to your hard drive. When running battery mode copy the programs that you need to run to hard drive and then use them
When your laptop running on battery: -
Bonus Tips#1 - Remove external, USB, unused PC card Devices
Bonus Tips#2 - Add more RAM
Bonus Tips#3 - Close unwanted programs that you do not use
Bonus Tips#4 - Disable Scheduled Automated Tasks