Power-efficient notebooks: Get the LED display, drop the SSD.
But wait: What about an SSD? In the end, HP will offer Intel’s 80 GB SSD for the 6930p and we all know that SSDs consume less power than a hard drive. While that claim might be true, it is interesting to note that HP does not necessarily pitch the SSD as a tool to save power. Yes, even the most power-efficient hard drives run at about 2 watts, which is less than Intel’s performance SSDs will consume, but 13 times more than what the 80 GB SSD is promised to swallow. However, the bottom line is that the power savings aren’t that great in absolute numbers.
The impact is about 7% or not quite 2 hours in the ideal case HP described. That may sound much, but we also have to consider the associated cost: Intel will sell that drive for $600, which means that you will pay at least that at HP. In the end, those extra $600 will buy you just as much battery time as the free driver update promises and only half the extra battery time the $50 LED may provide.
http://www.tgdaily.com/content/view/39486/145/