Battery Life difference between i5 and i7

[polbit]

I have a chance to get a cheap i7, and wouldn't mind the Iris graphics, but I'm concerned about the battery life. From what I've seen from some comparisons, the battery life is about 1 - 1.5 hours shorter on the i7 than the i5. Is that the general consensus here as well?

 

[polbit]

Never mind, decided the additional price and battery sacrifice too much, so back to i5/8/256. Hopefully I'll have one of those problem-free ones...

 

[Mmark]

I have both (i5/8/256 and i7/16/512). The real difference is ~30 minutes or so. That's for normal web/office use. It's getting worse for more processor depended tasks (like Adobe Lightroom or Premiere) - i7 does tasks much quicker but also shorten battery life. No free lunch...
Anyway I'm really happy with my i7 and definitely not going back to i5.

BTW Today I spent whole day in the office on the battery; 6:22 up time, 21% power left. i7 does the job nicely.

 

[macmee]

I only get like 5 hours on my i5 and I had an i7 and got about the same actually.