[grishka]

But the screen consumes most of the charge in a modern phone anyway. The smaller the screen, the less battery capacity you need to get a sensible battery life. The CPU also matters, of course — that's one thing I like about my Pixel 4a, it lasts long even after 3 years because it uses a weak-ass SoC that nonetheless is perfectly capable for messaging and web browsing.

[alpaca128]

The screen is off most of the time. The iPhone 13 Mini has the same CPU as the larger models and there is a significant difference in battery life, you likely won't find a review for this device which doesn't mention how fast the battery drains.

[grishka]

From my own experience, iPhones are really bad with idle battery life. The iPhone 11 Pro I have for occasionally testing iOS apps would drain the battery in ~3 days just laying on my desk doing nothing. Android phones, on the other hand, last more than a week when not used thanks to "doze mode" and other optimizations in recent versions. But I suppose that difference isn't as noticeable when you actually use an iPhone as your real phone and charge it daily at night.