When I'm on a longer hike I don't know how long my phone battery will need to hold out (don't get me started on solar and extra battery packs) so it stays off w

When I'm on a longer hike I don't know how long my phone battery will need to hold out (don't get me started on solar and extra battery packs) so it stays off with periodic check ins to stay in contact. Dedicated music players tend to have a much longer battery life, are lighter, cheaper to replace (weather, drops, being left on wet ground...). It allows me to listen to things without sacrificing my safety net.