Battery life: with 3D and music full on, it lasts me around 3~4 hours. Add in an extra half an hour when you are using 2D mode. Also there is a "Energy saving" mode that changes the lighting to fit the images on the screen, squeezing another half an hour in a game with several ambiance changes.
For DS games (and the GBA/NES/GB games from the virtual console), the larger screen gets a frame around so the images retain their original size.
http://www.guardian.co.uk/business/blog/2011/oct/26/european-debt-crisis-d-day-live
More or less, the Eurozone is about to explode as the Greek debt crisis (already spreaded to Portugal and Ireland) is also about to hit Italy. If that happened, the EU can pretty much be considered dead. So the President of Eur- I mean, the Chancellor of Germany, Angela Merkel, is talking to her deputy, Nicolas Sarkozy of France, to find a way to guarantee the debt and make it possible for the other countries to pay the already existing one. The main idea is turning the European Central Bank into an European Ministry of Finance and give them actual powers on the economies of the members, turning the EU into a de facto Federal Union.
Cue the 10 countries outside of the euro, leaded by Cameron and the British tabloids, screaming that they didn't sign up for this and that they want to have a say on the plans for the 17 euro countries.
And now the options increasingly look like two: the United States of Europe or an European Commonwealth without any political powers. Brussels has never been so entertaining as it is these days!
(By the way, if it isn't obvious, my area of expertise is politics XD)