Originally Posted by
UnCruel
I don't know what model Garmin you have, but it should save before dying. Mine has crashed and rebooted in the middle of an activity, and it only lost a little data in the the middle. Mine has also offered to go into low-power mode well before it runs out of battery. When I know I'm going on an all-day ride, I'll take a USB battery pack with me in my bar bag and recharge halfway through the ride.
Funny you should mention this, my 1040, which is many years old and has never had any issues, self powered off a few weeks ago, mid ride. I waited maybe 15 seconds and hit the power button. It re-started and was still tracking the ride. Nothing was lost, almost like I accidentally hit screen off on the power button, don’t know. Been fine since, go figure.