>A battery that lasted 1.5 day would not be as useful, because the battery would probably drain somewhere where having access to the battery charger is not as c

>A battery that lasted 1.5 day would not be as useful, because the battery would probably drain somewhere where having access to the battery charger is not as convenient as the one plugged at your bedside. A battery that lasted "1.5 days" might actually last a full day of heavy use, such as during travel. That's my biggest complaint about battery life with smartphones. They will generally last a full day on a charge, as long as you aren't using it often.