Apple 2009 MacBook Specifications download pdf (Page 25)

Chapter 2 Life with Your MacBook 25

Using the MacBook Battery

When the MagSafe power adapter is not connected, your MacBook 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.

If the 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.

You can determine the charge left in the 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.

Important: If only one indicator light is on, very little charge is left. If no lights are on,

the battery is completely drained and the MacBook won’t start up unless the power

adapter is connected. Plug in the power adapter to let the battery recharge, or replace

the drained battery with a fully charged battery (see page 33).

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Apple 2009 MacBook Specifications Page 25