iPhones have like 8-20 hours of charge now, depending on what I’m doing. My old iPod is <4 hours, maybe <2, but it’s enough for a walk. And if I’m out, where would I be charging it? I don’t usually carry a phone charger and wall wart. If I was out for days, I’d use my laptop to charge it, while listening ON THE LAPTOP, which has analog headphone jacks.