Is 3 hours enough? This will depend largely on how your body responds to resting this way. Some people are able to function on only 3 hours very well and actually perform better after sleeping in bursts. Though many experts do still recommend a minimum of 6 hours a night, with 8 being preferable.
When you call a dead phone does it ring?
Answer: A: With a dead battery it should not ring but it should go to voicemail directly.