Apple MACBOOK - Manual (Page 74)

74 Chapter 3 Using Your MacBook
Understanding Sudden Motion Sensor
Your MacBook has Sudden Motion Sensor technology, which helps protect the hard
disk from damage if the computer is dropped or shaken.
Sudden Motion Sensor protection doesn’t affect hard disk performance during regular
MacBook operation. Occasionally, unusually strong vibrations might activate the
Sudden Motion Sensor technology at a time when your MacBook is writing or reading
data intensively (such as when playing or recording video or audio). If you notice
dropped frames or sound elements, make sure that your MacBook is in a stable
environment without vibration or abrupt movement.
Using Your Battery
When the external power adapter is not connected, your computer draws power from
its battery. The length of time that you can run your MacBook varies, depending on the
applications you use and the external devices connected to your MacBook. Turning off
features such as AirPort Extreme or Bluetooth wireless technology can help conserve
battery charge. For more information about using your battery, see “Understanding
Battery Conservation Tips” on page 77.
You can determine the charge left in your battery by looking at the battery level
indicator lights on the battery itself. Press the button next to the lights, and the lights
glow briefly to show how much charge is left in the battery. You can check the charge
with the battery in or out of the MacBook.
If your battery runs low while you are working, attach your power adapter and let the
battery recharge. To replace a low battery with a charged one when your computer
isn’t connected to a power adapter, shut down your computer.