In this pleasant little video from Family Gamer TV, nine Nintendo handhelds are battery tested including the brand new 2DS. The results aren't terribly surprising -- the 3DS line all kick off fairly close to one another, at around three to four hours of maximum screen brightness -- but those Mugen batteries come off looking like champs. I hadn't even heard of them before.
The video also serves as a reminder that the Game Boy Advance SP was a tremendous system, though that's probably something you all don't forget. Too bad they couldn't dig up a Game Boy Micro for the test. There's always next time.