Photo: MacRumors KGI analyst Ming-Chi Kuo claims a new 4.7” OLED iPhone will feature a more expensive stacked logic board to accommodate a larger battery. Kuo said the phone would be able to pack the battery life of a 5.5” iPhone into a device roughly the same size as the current 4.7” model. With a number of seemingly conflicting reports emerging now with regards to how many iPhone models Apple will release this year, it’s…