Why battery life seem to be siginificantly better in laptop than in 2-in-1 of identical spec?

[e22big]

I notice in this review of Asus Zenbook UX362 (Flip 13) and UX333 (13 none-flip) that the battery life in the none-flip version of Zenbook seem to be a lot better than its 2-in-1 counterpart.

 

https://www.ultrabookreview.com/23572-asus-zenbook-flip-ux362fa-review/

 

https://www.ultrabookreview.com/23495-asus-zenbook-ux333fn-review/

 

Like what the title suggested, I am wondering why is this the case, since aside from the flipping mechanic (anday be the screen), these two model of Zenbook seem to be identical in nearly every way, including the battery size, CPU, and Ram. The UX333 has discrete graphic but otherwise this shouldn't impact their battery life (especially in a positive way) that much.

 

I noticed in the two cases that the none-flip UX333 seem to also be run with significantly lower wattage though, any idea why? What make the battery performance in these two models differ so much depite having otherwise the same hardware in nearly every way.

 

*yes the screen in these two models are probably not the same but flip UX362 model have even dimmer screen which shouldn't take that much toll on their battery.

 

 

[jj9987]

One has a touch screen, other one does not. That consumes more power, even if disabled.

[Akira Shimazu]

Touch screen display consume more power than non-touch. not only rendering images on display but also to responses our touches.