Turn off or close screen

does anyone have a good guiding tip regarding when I should only close the screen when not working on it, and when it would be best to shut the computer down. I can't find any information regarding how much battery usage it takes if I only close down the screen.

Hello lehrmann
Welcome to Apple Discussions
There is really no need to ever shutdown your Mac unless you the Mac will not be plugged into AC power for long periods of time (like Days) or if you need to power down in an attempt to clear an unusual Mac anomaly. The Mac will use very very little power when the lid is closed.
Some will tell you that it's recommended to leave the Mac powered on and only close the lid so that the maintenance scripts will be run regularly.
I have been using Mac laptops for almost 10 years now and I never power them down accept for the occasions listed above, and I have never ever had a problem with the batteries running down. I can put my ol' Powerbook to sleep (simply closing the lid) with 99% battery and no AC attached, leave it for three days, lift the lid and it's instantly up and ready to play with around 70% battery left. I think that's pretty darn impressive!

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Thanks for visiting Apple Support Communities.
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I have a MacBook Pro 17", and I routinely connect it to an additional Apple 20" screen when at home.
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Jon-
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Κοσμά τι λες; Τα έχεις μπερδέψει. Άλλο συζητάμε εδώ. Το ότι δεν μπορείς πια να δουλεύεις μόνο με την εξωτερική οθόνη (να έχεις σβηστή την ενσωματωμένη οθόνη όταν έχεις συνδεμένη εξωτερική).

Turn off or close screen

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