I've had my Rmbp 15 for like 3-4 days and i think my battery is bad. When battery is 100% it says it will last for 4:15 mins and i have turned down brightness to 40% and the only thing im using is a web browser with 2 tabs. Bluetooth is off. Keyboard light is off. My main concern is that it will only last 2h when im watching a movie or sum. What do you think? Is this normal or should i take it to inspection? How long does your rmbp last, and what are you doing ?