From my experience, the HyperMac battery duration times are significantly overstated. We all want to take the minimum of additional weight with us when we travel, and so we all try to optimize. Thus comes the decision about just what size of HyperMac battery do I need, right?
As I mentioned in another post, I have a 150Wh model and it is my experience that I can get about 7 hours out it using my 17" MBP. I could probably squeeze some more time out of the battery if I further decreased the screen brightness (which I keep at around 1/2). Regardless of whatever I do though, my experience is that flying from the US, by the time I reach Europe, the battery is drained. The good thing is that my laptop battery is still charged up and so I'm ready to do whatever work I need to do. On the longer flights to the Middle East I would have to tap into the laptop battery as well.
The question is, how much computer use time do you think you'll really need? Even on a very long flight you'll probably end up sleeping, reading, maybe watching an in-flight movie, etc. You could also put some TV shows or movies on your iPhone or iPod Touch and watch them that way. I think it's quite acceptable for some of the video content (especially the shows). That way you'll use way less energy than using your laptop. The HyperMac batteries have a USB port on them as well, and so you can keep using your iPhone or iPod Touch and keeping it charged up for a very long time.
Decisions, decisions...right?
Regards,
Jerry
