The Acekard 2i is the same size as an original cart and you don’t have to flash your machine or use a passme in order to use it Acekard 2i writes directly to the save file on your MicroSD card. No need to manually select save types nor battery. Save files are compatible with other flash carts. All you need to do is make sure the save file has the same prefix name and put it at the same directory of file. Then you can just run the software to use new save file.