The surprise here is that it comes from a 3rd party developer.

http://screwattack.com/videos/Nyko-PowerPak-Test

It's a good thing to know you have good options for upping the battery life on the 3DS. This might have been one thing that has kept people from buying the console, as the battery runs dry pretty fast and the console won't hold on a longer trip. Haven't heard of Nyko for quite some time but it's good to know the thing they happen to throw at us is actually worth your money.

Nice. That is one of my biggest complaints about handhelds, the battery life.

Same here, although my DS Lite has had a good battery life so no complaints here.

If I happen to get a 3DS I just might get this or maybe even the one that triples the battery life, mentioned at the end.

I'm considering getting a 3DS for Revelations and Mercs 3D (and some more games of course, but mostly those 2), and if I get it, I will definitely buy that triple pack. It always makes me angry if the battery is low after a few hours playing.