Many users have noticed that MacBook work best when No. the battery, otherwise the system becomes slow, this being a strange design 'error', as corroborated by tests carried out by gearlog. Although noted in an August support article prior to the 2008 refresh, the systems drown the processor on purpose when you are receiving power only from the power adapter. The company said this process is necessary to protect the apparatus a eventual blackout if the work you need more power than the adapter can supply.
In the tests carried out, the drop in performance is significant downward in the test CINEBENCH R10 in a MacBook Pro de 2,53 GHz of 5,549 points to 3,504. The disparity leaves the system in a 63 % of their normal productivity, which is worrisome.
This is rare in most manufacturers of PCas they normally decrease the productivity of the processor when it is using power from the battery To lengthen their operational period, it is also possible that it complicated the long-term use of the portable de Apple if performance drops when the battery is discharged or about to run out. Users will need to purchase another battery or a new system, despite the state of the work itself.
Via | Faq-Mac
* Updated: December 9 2008, 18:40