Consideration may be directed also by choosing a laptop that is smaller in size such as ultra portable or light weight laptops.
They have smaller LCD and it uses less power. It has a hard drive that runs only about 4200 rpm which uses less power than those than run at 5400 rpm. This makes your laptop battery drain less quickly.Universal batteries for laptop use are available in different types according to the size of your laptop. A friend bought a nickel metal laptop battery which is suitable for her small size notebook. I want to buy one myself however I was advised it is not suitable for my laptop which is 16 inches. The most suitable one is the ED369 battery which is best for laptops that are 13 inches or more in size and when one uses a lot of external devices that requires more battery power.
This battery provides 2 to 3 hours of power supply in normal conditions. Simply plug it into the AC adapter of the laptop and it is ready to use.