M2 MBP battery life doing Keynote presentations

[pgolik]

I'm beginning to consider replacing my old trusty 2015 15" with a modern M2pro (or M3pro whenever that comes out) MBP, leaning towards the 14" model.
I have a very specific question regarding battery life: how long does it last giving Keynote presentations to an external projector (let's assume HD resolution, 1080p) through HDMI, with the built-in display also on (but could be reasonably dimmed). My old 15" (with a recently replaced battery) barely lasts 90 minutes, and I can get ~5-6h max from my iPad (M1 11" Pro).
How would a modern Apple Silicon MBP do in this scenario?

 

[OrenLindsey]

It'll have really good battery. I have the 14" M2 Pro, and it will give you like 10-12 hours. HDMI doesn't use that much power.

 

[arcite]

You can always buy a third party external battery pack.