I've had my 2015 macbook pro 13inch (base) for 10 days now. apple says we can browse the web unto 10 hours with screen brightness set to 75%. The battery lasts nowhere near 10 hours. more like 6 hours this is how i use the macbook. 1. screen brightness at 37.5% (6 clicks from the bottom) 2. mostly web browsing ( i had flash installed but deleted it) 3. if I'm not using safari then either using messages , FaceTime (making phone calls through my iPhone 6) and lastly the 2015 Microsoft office beta. i checked activity monitor and none of these drain a lot of battery except for safari. 4. don't use the backlight on keyboard bcoz I'm using it in daytime. the battery's full capacity is 6531 (mAh) which is normal (i think) also I've had no issues with lag should i return it and get another one? i still have 5 days left. how long does ur battery last ? does anyone else have the same issues? how can i fix it?