Leave the battery in place.
Credit: Apple

For years IT-savvy users have been removing their batteries when running their laptops off a power outlet. This reduces the hit on the limited recharge cycles of laptop batteries and extends the life of the cell considerably.

However, owners of the MacBook and MacBook Pro may not have this luxury. At first it sounded like an urban myth that Apple laptops would start slowing down with the battery removed and the unit running only off AC. However, an official support article on Apple's Web site confirmed this.

According to the Cupertino company, this is a "feature" which reduces the processor speed to avoid a situation when the power adapter is unable to supply the power needed by the chipset. To reach the full performance potential of the machine, you'll need to put in the battery.

So if you intend to do some intensive Photoshopping, leave your battery where Apple wants it to be. Take note, however, that the MacBook Air is exempt from this requirement.