My old Etrex yellow from 2000 sometime takes a while to relocate itself, but that is only 1/2 hr, the one you have does it have a rechargeable battery, mine runs on 2AA battery and will last 22hrs running, and I use it as a backup for vehicle location IF I drop and damage my phone, as I wonder around the Australian outback on the west side. There has been many a prospector lost and perished over here, ⁣ and will be doing another trip Friday of next week.
Haven't seen a GPS that lasts more than a day or so, running 24/7.