Hi everyone, Does anyone know How I can re-download Lion from the app store if I bought it last year? I can't seem to find it but see mountain lion is available for download. I bought mountain lion about a month ago and the battery life seems to be cut in half. I used to get around 8 hours simply for light use. Now I get half of that. I travel with my laptop to class each day to take notes and would not want to have to keep carrying a charger cable with me. Thanks.