Nyko has announced their Power Grip Pro, an alternative to Nintendo’s Circle Pad Pro that doubles as a case and battery pack.
The peripheral will be released this October and retails for $30, as opposed to $20 for Nintendo’s first-party additional analogue nub accessory. The Power Grip Pro promises “up to 3x the playtime” due to its battery pack.
Power Grip Pro will be compatible with all Circle Pad Pro titles, few they may be. Currently the only western releases that have Circle Pad Pro support are Resident Evil: Revelations, Metal Gear Solid: Snake Eater 3D, Kid Icarus: Uprising, Ace Combat: Assault Horizon Legacy, and the upcoming Kingdom Hearts: Dream Drop Distance.
Right now the Circle Pad Pro is n a GameStop exclusive.