2013 MBA -- i5 vs. i7 battery life?

[stagmeister]

I've been waiting for a Haswell rMBP for a long time now. But since the back to school promo came out without an update I'm almost ready to give up and just get the 13" MBA. But I have a question. I do iOS development and would probably want to get the i7, what's the difference in battery life between i7 vs. i5?

 

[larry918]

There are a few threads about this already, and from what I've heard, the differences are indistinguishable.