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Apple Notebooks Take Huge Performance Hit without Battery
Gearlog —
... After some digging, I found that the performance drop is documented on Apple's support Web site--though honestly, Apple's reason for forcing a drop in processor speed doesn't make a whole lot of sense. Apple justifies the speed reduction by explaining that it "prevents the computer from shutting down if it demands more power than the A/C adapter alone can provide." But what happens when a battery is no longer able to hold a charge? Does the processor speed drop in that case as well? ...
New MacBooks Take Big Performance Hit With Battery Removed
Wired: Gadget Lab —
... the MacBook Pro turned in a score of 5,549. Without the battery, it scored 3,504.
While this may appear to be a minor issue -- since most people keep their batteries in their MacBook -- Honig pointed out that some like to remove their batteries and run off the AC in an effort to extend the battery's life cycle. Also, eventually all batteries reach the end of their life cycles, and if you're running the MacBook off the AC, you'll see a significant plunge in speed.
Apple acknowledges the issue at its support site. The reasons? If the battery ...
Run your MacBook without a battery and throttle the performance
jkOnTheRun —
... You may want to read that last sentence again. If you pull the battery out of your MacBook Pro and run it while plugged into the power outlet your MBP will slow down almost 40%. This intrigued the Gearlog folks so they went digging and found a discussion on the Apple support document that describes what is going on: ...
MacBooks take performance nosedive on AC power alone
The Unofficial Apple Weblog (TUAW) —
... that in testing a MacBook Pro, they found substantially lower performance while running on AC power alone, with the battery removed. Apparently, Apple doesn't hide this quirk; there's a Support Document claiming that this is done to prevent "the computer from shutting down if it demands more power than the A/C adapter alone can provide." ...
New MacBook Pro performance degrades with the battery removed
The Apple Core —
... . With a battery the MacBook Pro scored 5,549 , without 3,504 . An Apple support article ( HT2332 ) claims that the performance drop in both the MacBook and MacBook Pro “prevents the computer from shutting down if it demands more power than the A/C adaptor alone can provide.” It also warns again using the notebooks without the adaptor connected because “accidentally bumping the A/C adaptor could disconnect power and shutdown the computer.” Why would anyone want to use a MacBook without the battery, anyway? (Tip: Chuck Freedman, ...
New Macbooks performance suffers with only AC Power
Apple Gazette —
... did a little research and found a Support Document that claims this is done to prevent “the computer from shutting down if it demands more power than the A/C adapter alone can provide.” ...
Report: MacBook performance tanks sans battery
Infinite Loop —
... whenever the machines do not have batteries installed. Apple does mention the speed reduction on the Apple Support site, but the description of this behavior is pretty understated and doesn't make it clear just how of a hit it may be. The fact that MacBooks and MacBook Pros do this type of throttling isn't news, but what is surprising is the magnitude of the speed and processing power reduction. In Honig's case, a 2.53 GHz MacBook Pro running on A/C power and without the battery installed received a 37 percent lower score on the Cinebench R10 test suite. 37 percent. Repeat ...
Examining the Battery/AC Performance Gap on MacBooks and MacBook Pros
TheAppleBlog —
... , who ran the tests, doesn’t mention any limit to the models affected, and the Apple Support article officially noting and explaining the issue is actually dated from before the release of the new notebooks, so it must reference previous models as well. ...
Examining the Battery/AC Performance Gap on MacBooks and MacBook Pros
TheAppleBlog —
... , who ran the tests, doesn’t mention any limit to the models affected, and the Apple Support article officially noting and explaining the issue is actually dated from before the release of the new notebooks, so it must reference previous models as well. ...
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