The text or email comes with a map showing my exact location. Say I got my pickup stuck on a back road, I could send a text asking particular friends or family for help. They could text back saying they are coming, and I could reply to them until they showed up. Another use during a backpack trip is a simple daily message telling people I am fine, what I did today, and a map showing my exact location.
Of course, all these devices need recharging so the light blue device about the size of a lipstick case is a portable recharger. I own several of these.
The longer, light blue device is very low tech but I carry one at all times. It is a LifeStraw so that I will always have filtered water, no matter what, for about $15. I can suck water from a stream or pond, through this filter, into my mouth.
The large, white device is a blowup, solar powered lantern, made by LuminAid. It folds up small and when charged, the brightest setting lasts about two hours, while the dimmest setting lasts about two days. These also come with solar-powered electronic chargers built in.
Last, a rather heavy flashlight that does not use batteries. I shake it until a charge is built up.
Hiking is much more complicated these days, my backpack is heavier, but technology has added a lot to a hike.
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