How to Make Laptop Battery Last Longer

The more you use physical devices, which require more electricity to operate the more of the battery’s power you can expect to consume.
The devices that create a larger power drain are the graphics device, LCD backlight, hard drive, the floppy drive and the CD-ROM.
usually laptop battery can run 3-4 hours per cycle. but you can make last longer with this tips and trick.

1. dimm your backlight LCD screen with this combination key (FN+F4)
2. adjust the color depth to 16 bit. This is more than enough in office and internet applications.
3. if you have “laptop gamers” i suggest to underclock (lowering clock) your GPU core. lowering GPU core is not effect in office and internet applications. nVidia graphics device can using with nVidia n Tune software.
4. Turn off unused devices
   Many new notebooks provide a hard-wired On/Off switch for the Wi-Fi radio or Bluetooth for this reason.
   To save even more power go to the Control Panel, select System–>Hardware–>Device Manager, and disable the following items: Ethernet adapter, infrared transceiver, and Bluetooth radio . You should do this beacause having Bluetooth enabled and not using it actually consumes quite a bit of power.
5. Decrease hard drive activity
   Defragmenting your hard drive regularly will decrease the frecuency with which your hard disk has to spin, therefore the battery will last longer. This is due to the fact that defragmentation optimizes the placement of the data on the drive and when a program makes a request for certain data it can be found more quickly.
   To defragment your hard disk follow the steps in this article.
   Another way to decrease hard drive activity is to set your paging file to a fix value, and this value should be around 1.5 times the amount the RAM you have installed on your computer.
   To set the paging file go to the Control Panel and click through System -> Advanced -> Performance Settings -> Advanced -> Virtual Memory Change.
6. Disable startup items
   Startup items are programs that load into memory every time Windows boots up and cause other open applications to spill over virtual memory and adds to the CPU load, shortening battery runtime. Here is how to remove some of them that are not necessary.
   in windows OS you can disable startup items with this following tips:
   start –> run –> msconfig –> startup tab –> uncheck unnecessary application –> OK

7. Another way to condition your battery is to keep it cool. It’s best to use (and especially charge) your batteries at room temperatures. Extreme conditions can drain your battery quickly
8. if you have centrino 1st generation based laptop, you can try NHC (Notebook Hardware Control) software.
   its can control your processor and disk drive to make more save power.