I'm curious what kind of battery life you get with a data doubler? I have a macbook late 2009, and mavericks is reporting my battery life is estimated at 3 hours, 15 minutes when I have 100% charge. I do feel that I'm really only getting about 3 hours battery life in real use (safari, opera browsing, no other apps). Is this typical? Coconut is saying the battery is 85% of design capacity and 390 charge cycles. I wonder if removing the secondary hard drive and keeping just the ssd will give me back 5-6 hours of battery life?