Yes Im being hyperbolic, battery life at full load is going to suffer tremendously, especially when you consider the degradation of battery performance over the years.
I can't wait to get my hands on a Mini, but there's no doubt in my mind that the battery life will be a step backward. That's the trade-off.
I had a 6S and I couldn't stand the battery life (or size). "Down"graded to a 2016 SE and the battery life was leaps and bounds better -- plus, it didn't shut itself off outside on cold days.
Based on Apple's spec page, it does look like the Mini has worse battery life than the 12. The real question is:
- how is standby battery life?
and
- what kind of impact does 5G have?
The number's on Apple's site are a great deal better than the 2020 SE's battery life, so I think we might have a good balance here. Hopefully.
Try to run Instagram today on an iPhone 6, you won't be able to even scroll a feed of static images smoothly without hitching. Imagine what it is doing to the battery.