My 6 month old rMBP 15 with 105 battery cycle count and 95% battery health (based on iStat Pro) will only last about 3 hours on a full charge with about 70% screen brightness and exclusive dedicated graphics card usage (I watch videos via VLC and I cannot disable dedicated graphics when using VLC). Is it normal? My previous MBP 17 lasted about 4.5~5 hours doing the same thing and I was expecting similar battery life with my rMBP. Is there any good media player for OS X that uses only integrated graphics card? I believe dedicated graphics card needs much more power so drains battery quicker. Any tips on extending the battery life will be appreciated!