Whenever you are purchasing the laptop batteries do not spend hard or too many on the laptop battery for better efficiency and battery back keep in mind getting bigger is not always better. As many of today’s laptop are very long working and gives better backup to the user. Laptop battery are made with a advanced power saving technologies that provides long battery power with and consuming less power voltage.
Today’s laptop generally 17 inch laptop battery consume 40-50 % more power than the laptop with a 12 inch. Laptop consumes more power when the level of LCD brightness is more. This will reduce the performance of the battery and more power consumption is used. Always dimmed the screen brightness to low when the battery is low, this will give your much better battery backup. Also there are many such services you can turn them off when not needed. If you have a printer attached to your computer turn the file sharing off that takes much battery power. Also for reducing the brightness of the screen hold down the Fn keys and press the brightness down or up key the adjust the brightness level.