Extended Battery for controller?

[The_Mitch]

Seeing as how there is a lot of room in the Wii U Game Pad battery compartment since the battery is so small (smaller than the 3ds battery), does anyone know if a larger battery has been made yet for the controller (official or 3rd party)? I don't want one that requires a different back or anything though. I want to be able to remove back, take out he standard battery, put in a larger battery (one that hopefully fills the whole compartment) and reattach the standard back plate. Anyone know of such a battery?

 

[castlezelda]

Nyko might be releasing http://www.nyko.com/products/product-detail/?name=Power+Stand+%28White%29

or to Uboost http://www.nyko.com/products/product-detail/?name=UBoost+%28Black%29

 

[The_Mitch]

The first one is just a charger stand which I already have since I have the deluxe bundle and the second one, while it would work, adds something to the controller which I don't like. I'm wanting to be able to keep the controller looking stock so I don't want anything added on. Just a battery that takes advantage of the extra room in the battery compartment without needing something extra on the controller so from the outside it looks 100% stock

 

[Brainstraw]

I'm sure there will be one sooner or later, but seeing as how the system is so new, I'll bet 3rd parties are still working it out.