oh, and here is the wikipedia writeup of nickel-zinc:
http://en.wikipedia.org/wiki/Nickel-zinc_battery

How does a 7" screen fit in with this target range I wonder?

Personally I would love to see an appraisal of Moblin Linux running on a Viliv X70.

Nah. The battery business is rather cutthroat right now. Has been for years. The only real difference is, unlike other industries where a lot of companies get together and agree not to compete, but instead work to fix prices (like the oil companies do), there's some 40 different companies in the battery biz all vying for your business. And there's an incredible amount of oneupsmanship in the industry too. Because if you don't, someone else will pass you and you'll loose a lot of business.

Heck, take a look at Energizer. They totally left Duracell holding its *** in the AA battery market lately with the introduction of their 4x and 8x Lithium batteries. Yeah, they're a bit expensive, but dude, my new camera is a battery hog (kills high capacity AA's in 4.5 minutes!) and yet these 8x Lithiums will last almost 20x's longer than a standard AA in the camera. Plus, oddly enough, they have a rather neat "bounce back" feature to them. IE, use them till they die, let them rest a bit, turn the camera back on and bingo! you've got another handful of pictures you can take with a suddenly revived battery. Rinse, repeat several dozen times it appears. You can't do that with any other battery that I know of.

So yeah, with the rise of so many electronic devices needing batteries, plus electric cars, and other things, everyone's looking for the holy grail of battery tech, and more progress has been made in the past 10-20 years than has been made in the past 200. And it's only going to get faster and even more people join the hunt for the perfect battery tech. Heck, they're even considering using super capacitors for batteries. Just think. >90% efficiency, super fast charge times, 99% discharge, as much power when you need it, where you need it, and energy densities far, far exceeding any battery tech imaginable. Especially if they use the carbon nanotube cores. So that's one battery tech I'm eagerly looking forward to.