When my daughter's macbook air arrived I was so excited. I updated the OS and started setting up apps for my daughter. I tealky wanted her to like the machine but after trying to do homework using it the battery, which was charged for 8 hours, was almost half way down.I then went in and made some adjustments that normally extend the battery life but to no avail. My daughterbis a sophomore in high school and needs to have a longer battery life.The machine was very clean, fast lite but at times a bit glitch. After using for a few days we decided that it would best to return it.