The Case of (RUMORED) The Slimmer iPhone 6 and Battery Life…

I'm really getting a bit frustrated at the comments people are making about battery life of the rumored slimmer iPhone 6. Does anyone not look at past products that Apple has produced and how with smaller chipsets and board sizes comes larger batteries? With the increased screen size of the rumored iPhone 6 you get a larger area for a battery. Have you ever looked inside a iPad Air? Check it out below. The battery makes up about 70-80% of the insides. 

Going by the above image and design of the board and chipset, I propose that the iPhone 6 will get both increased screen size and larger batteries. I made a quick mockup below just using a iPhone 5s internals moved around to illustrate. 

 I think anyone saying that better life will suffer is wrong. If anything it will stay the same or maybe even increase a little.  What do you think?