Mine took like 2-3 hours the first charge as well and every charge after that. I still have yet to get a full 10 hours of play out of the thing on one charge however... still averaging 6-7, same as my wife with hers. This also was the case with the DS with dead pixels that I sent back to Nintendo.
*shrug*
I still don't know what you guys see in Polarium. The game got bleh reviews and when I played it I can see why... after about 15 minutes I was bored with that game. Meteos I haven't tried but I've also heard and read it is very so-so. Zoo Keeper is pretty good, and is cheaper than other games, I bought it new for $20. I've been told it's just a 'port' of Bejeweled which apparently is very popular among PC people though I've never seen/played it. But if that's the case I can understand why it's so popular... easy to pick up, hard to master, lot's of fun.
Personally I can only stand so many puzzle games anyways. Between picking up Lumines and Puzzle Bobble on PSP, and Zoo Keeper on DS, I definately don't need any more for the time being. It kind of sucks that the DS is being flooded with puzzle games so early on all with the same damn gimmick of using the stylus.
Oh and, Lubidog, I thought it was pretty unanimous that Mario was the best DS game thus far? *shrug* best one I have anyways. Canvas Curse is definately a very close second.