A big step difference, mainly in graphics power and efficiency

A forum poster notes that the step between 4th and 5th generation i5 processors is a big one.

Broadwell (5th gen) is a very incremental step from Haswell (4th gen) as CPU performance goes. The biggest differences are in graphics and power efficiency but the i7 laptop also has an AMD GPU. - www.tomsguide.com/answers/id-2509971/5th-gen-4rd-gen.html

This is in agreement with most of what I've been reading, that the jump between 4th generation and 5th generation i5s is a big one both in performance and in reduction of power consumption.

90 minute boost to battery life?

In an article from expertreviews.co.uk, it is mentioned that the new changes in the 5th generation line of core processors "have led to a 90 minute boost to battery life in portable devices when watching Full HD video, a 22% increase to frame rates in games and up to 50% faster video conversion rates."

There are other improvements mentioned in the above referenced article, such as other 3d and graphics capabilities, and enhancements related to natural language.

1.5 hour increase in battery life?

According to ... Nevermind - 1.5 hours is equal to the 90 minutes that was mentioned above. "1.5 hours" just seems a lot more at first glance to me....