Apple Watch Ultra 3

> Emergency SOS via satellite,…, 42-hour battery life

So if I am in a critical situation in the mountains, with only 8h battery left, I hope rescue teams will find me in that 8h window.

My Garmin will give me a week at least, and in low power mode two to three weeks?

SOS message went out with your GPS coordinates, so best advice is to remain where you are and use its reflective surface as a signal mirror.

So keep the garmin? This also sounds like an edge of an edge case. If the SOS went out it includes coordinates. You would want to stay put.

Basic survival advice is to stay put and wait for rescue unless you're in imminent danger. So maybe if your watch is your only lifeline stop running around the mountains once it dies.

Or use something intended for the purpose like a Garmin inReach. The satellite SOS features on phones and watches are nice to haves that could absolutely save your life but they're no replacement for being prepared. Really no device is a replacement for being properly prepared in the wilderness, even with your location you still need a way for rescue teams to spot you, for example.

I personally wouldn't rely on my phone/watch if I'm headed anywhere remote without cell service & electricity. With Garmin inReach you don't just get better battery life - you also get the Iridium satellite network and a team that's more experienced at search and rescue.

That being said, I do think that these new emergency SOS features will come in handy for people who don't know what they're getting themselves into, or who just run into unexpected bad luck on what was supposed to be a quick day trip.

> So if I am in a critical situation in the mountains, with only 8h battery left,

Please carry a personal locator beacon.

They make external batteries for watches just like they do for phones. Or you can carry a charger and use it with the phone battery.