Apple MB403LL MacBook Manual - Page 25
Using the MacBook Battery, Important - a power adapter
UPC - 049000056976
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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). Chapter 2 Life with Your MacBook 25