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Helpful answers
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Mar 9, 2012 10:55 PM in response to namethatisnttakenby Shootist007,★HelpfulYes you can but it will only charge the unit when it is powered down. It won't charge and run it at the same time.
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Mar 9, 2012 11:01 PM in response to namethatisnttakenby Courcoul,15" and 17" MBPs use the large 85 watt power adapter.
So, of the computer is powered on, the adapter will be overloaded and may get damaged, and there won't be enough juice so the battery will slowly drain.
If the computer is powered off, who knows what will happen. It may charge or it may get overloaded and get damaged. The 13" has a 63.5 W/Hr battery, the 15" has a 77.5 W/Hr battery; will that difference be significant, besides a longer charging time?
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Mar 9, 2012 11:30 PM in response to namethatisnttakenby shldr2thewheel,Read this: http://support.apple.com/kb/HT2346. You really need to use the correct charger.
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Aug 28, 2012 4:23 PM in response to namethatisnttakenby wine-o,I found the following post to give a plausible explination. Basicly with a computur that needs 85w using 60w may cause intermitant charging with heavy cpu use, for a computer needing 60w using a 85w will not cause problems as the 85w adapter can change output.
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Apr 19, 2016 3:12 AM in response to shldr2thewheelby akoj,That page really isn't helpful because it doesn't explain anything.