Battery life is an obsession of mine. My wife & I usually take several extended camping trips per yr, poor or nonexistent cell coverage is the norm even with Verizon (AT&T is the only other option). I really monitor battery usage closely; I will delete or close apps that use excessive battery & use airplane or turn off if needed. Our kids or friends will text instead of calling; will answer when have cell coverage. Can usually go 2 or 3 days & charge when gets to approx 50%, can only charge while driving.