In fact, my old 13 PM had a pretty heavy use phase.
While designing and building my new house, I used A LOT (A LOT) an app called BIMx. That app was pretty battery and chip demanding (especially with 3D model). My 13 PM often gots hot to the touch.
The Air has arrived just in time to avoid that phase. And thank goodness, because with the Air it would have been more problematic.
I mean, I couldn't fool a friend and tell them the Air has a great battery because, in my experience, that's not true. It's pretty close to a four-year-old 13 Pro Max with 80% battery health. It’s just… ok… being optimistic…
I wish I could try the Air, because you know, maybe, just maybe (and this is just a theory), the Air is very well-optimised for light use, but suffers tremendously with moderately heavy use.
I used an iPod Touch 5G on iOS 6 and an iPhone 6s on iOS 9 (and another one on iOS 10), all had decent SOT with light use (6 hours for the iPod and 8-9 for the iPhone 6s), but heavy, outdoors camera use would kill both relatively quickly.
The iPhone Xʀ I have on iOS 12 is a middle point: absurd SOT with light use (I got 16-18.5 hours of SOT with efficient use), but moderate, outdoors cellular use would make it drop quite a bit (to around 11 hours). Heavy camera, cellular use would make it collapse like every other iPhone. I’ve repeatedly tested it with multiple outdoor, heavier cellular usage patterns and it would collapse to about 40-50% of my high-end light SOT, to about 8 hours.
The 16 Plus I have now is the true standalone: Ridiculous efficiency even with heavy camera use, barely dropping when compared to my light SOT usage pattern. Literally two days ago, I went to watch a tennis tournament and shot video, cellular, outdoor brightness. Final result: 2h 45 min of SOT with 89% remaining. That is insane. Other cycles have shown similar results with even more use.
But, the 16 Plus has a 4,674 mAh battery vs =~ 3,100 mAh for the Air. The A19 may be efficient, but the heaviness of iOS 26 and the small battery vs other recent iPhones (my 2,942 mAh iPhone Xʀ runs iOS 12 and still suffers), makes it so the processor efficiency cannot be a substitute for battery capacity with heavy use. (Or even moderate use).
Some really wild variations with battery life on people’s Air’s! I know everyone’s usage & expectations are different, but wow!
It seems long stints on 5g are very hard on the battery’s, I’ve seen others say the same on X.
I wasn’t sure what to expect and I’ve been pleasantly surprised for what I would call my normal daily usage (over 8 hours screen time yesterday, 100% to 35%)
I was sceptical of Apples claims but also want expecting Pro/Pro Max levels of battery performance.
Today isn’t looking so good, the difference today is that I took a tonne of photos this morning and done some editing & a quick top up charge this morning.
Also only charged to 95% limit first thing when I got up.
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This result also seems to indicate a similar result: 63% used with 5h of SOT is not that great.
So, due to processor efficiency: light and optimised use, will be very decent for its battery size.
Push it, even a little (as you said, 5G alone seems to have a massive impact, like it did for me with the 5c, for example), and it suffers far more than recent, larger iPhones.