Battery life it's supposed to be up to 11 hours. I had charged the macbook to 100% a night prior to my exam. On the time to start the test I had still 100%, to my disbelief it was berly an hour after using it during the test that I had already consumed 70% of its battery life. Worried I still had 2 more hours for the rest to go. I had to speed up the answers. Now I don't know yet I I did ok being under this kind of pressure. I FEEL SCAMMED!!!! DO NOT BUY IT!!!!