I understand that Apple Watch does many things in the background. But when you’re comparing something like an Apple Watch vs Garmin Epix.
If they’re both turned on for hiking they are in theory using the same processing power, measurements. Apple Watch isn’t doing anything different. So why is it so poor? What else is it doing…
Why did my old Nokia 3310 only need charging every so often but my modern smartphone of almost any brand require almost daily charging? The answer is that the new smartphone does more stuff so needs more power. AW does more stuff than a Garmin watch, so needs more power. I’d also guess that the physical size of the battery is smaller in an AW due to more sensors/radios etc. but I’ve literally done no research on that, so may be wrong. If I’m right though then that will also contribute.