it's a battery suck...uses about 1% per hour, sometimes a bit more...really comes down to whether that kind of wear and tear on the battery affects your day...On my AT&T version, kept it on and 12 hours off the charger, was down to 15%, with 2.5 hrs of screen time. Shut it off, had 35% left after the same amount of time, similar screen time...(was camping....not great cell signal,but not aweful)