1. 8+ hours of battery life running only vim and Erlang unit tests on Linux. Would honestly enjoy 12 hours.<p>2. <=1.6 kg (3.5 lb)<p>I don't care about GPU or processor. It can be ARM (well.. Vim implies it has to have a workable-size physical keyboard).<p>Why is it so hard to find one? Or do I miss the one?
The x220 with a 9-cell battery weighs 1650g. It is in every other respect the perfect development ultraportable - it's powerful, extremely frugal in lower power states and has a mSATA slot allowing for both an SSD and a HDD. It'll run for 8 hours on a realistic workload and 12 hours on idle, although like any laptop you'll want to run linux in a VM under windows, as you'll get better battery life.<p>Unless you're taking it into space, just suck up the extra two ounces and buy the better machine.
Asus Transformer Prime should last about 15 hours with the keyboard dock. It's based on ARM. I have no idea if Vim can work on Android, though. Maybe this will work:<p><a href="https://market.android.com/details?id=com.aor.droidedit&feature=more_from_developer#?t=W251bGwsMSwxLDEwMiwiY29tLmFvci5kcm9pZGVkaXQiXQ." rel="nofollow">https://market.android.com/details?id=com.aor.droidedit&...</a>.<p><a href="https://market.android.com/details?id=com.touchqode.editor&feature=search_result" rel="nofollow">https://market.android.com/details?id=com.touchqode.editor&#...</a><p>There are others, too. If you need it right now, this is the only one that can last that much. But if you're not in a hurry, you might want to wait for a larger screen combination, which I think will appear by summer or so.<p>Here it is, even lighter and half the price of a Macbook Air:<p><a href="http://eee.asus.com/en/eeepad/transformer-prime/specification/" rel="nofollow">http://eee.asus.com/en/eeepad/transformer-prime/specificatio...</a>
How about macbook air? You can run vim on it.<p>1.35kg, 7 hrs (using wireless web).<p><a href="http://www.apple.com/macbookair/specs.html" rel="nofollow">http://www.apple.com/macbookair/specs.html</a>
With the wireless off, the 13" mba should do that<p><a href="http://www.everymac.com/systems/apple/macbook-air/macbook-air-faq/macbook-air-mid-2011-real-world-battery-life-core-i5-core-i7.html" rel="nofollow">http://www.everymac.com/systems/apple/macbook-air/macbook-ai...</a><p><a href="http://store.apple.com/us/configure/MC965LL/A" rel="nofollow">http://store.apple.com/us/configure/MC965LL/A</a>?<p>$1300<p>Ubuntu installs on them fine.
11" Macbook Air = 1.08kg
HyperJuice 60Wh external Battery = 0.36kg<p>Comes in under your weight limit, will give you 10+ hours. Only disadvantage is it's a cumbersome / weird form factor, macbook plus external batt.<p>However, if you find a decent small bag, it won't really be that much of an issue.<p><a href="http://www.hypershop.com/HyperJuice-External-Battery-for-MacBook-iPad-60Wh-p/mbp-060.htm" rel="nofollow">http://www.hypershop.com/HyperJuice-External-Battery-for-Mac...</a>