I've got the new macbook air 11" i5 version. I'm getting under 3 hours with the full charge. 3.5hrs if I lower the brightness. I had the backlit keyboard turned off. Apple advertised 5 hours battery life. Didn't really care. My brother's gf got a macbook air. She's getting 5 hours.... The first photo is with medium brightness. The 2nd photo is with max brightness. Is this normal for you guys? Cheers!