User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-1758220-20120913191304/@comment-1726879-20120914080506

Aandrew: I sincerely advise that you DON'T buy the 3DS circle pad pro. It is rather irritating in that it will not at all compensate for the 3DS battery life, as such, you will only be getting about 4 hours of charge on the go, supposedly.

I would advise waiting until the release of an XL variant of the Nyko Power Grip Pro. That does the exact same job as the circle pad, but ups the battery life, as well as most likely being a lot prettier to look at. Just my opinion of course, but as a portable device, a long battery life would probably be a good thing.