Fortunately you can set it to mute in case you need an uninterrupted afternoon power nap.

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Jawbone's also augmented the array of alarm options, adding Power Nap and Idle Alarm, which function much as they sound, alongside the more standard Smart Alarm.

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The new Mountain Lion system also adds something called Power Nap, a feature that keeps your laptop up to date while it sleeps by automatically refreshing mail, contacts and other apps.

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The extension of the Smart Alarm is Power Nap.

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The new Mountain Lion system also adds something called Power Nap, a new feature that keeps your laptop up to date while it sleeps by automatically refreshing mail, contacts and other apps.

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One particular example has it guiding users though an efficient power nap, by starting a timer once they've started dozing and only waking them once they've come out of a deeper sleep state.

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He generally rises at 10:20 a.m. and tends to fast through the workday, taking his sole meal at dinner, after a half-hour power nap in his office lair, an 8-by-10 room with nothing but a scribble-filled whiteboard, purple couch, two orange earplugs and an inhaler.

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