If the PowerBook is in sleep or is shut down, internal and external batteries charge simultaneously. If both batteries are fully depleted, it takes about 41⁄2 hours to charge both. If the internal battery is fully charged or absent, the external battery takes a little over 2 hours to charge.

Removing or replacing the battery

mIf the power adapter is plugged in, you can use the computer indefinitely without a battery.

mIf the power adapter is not plugged in, the backup batteries in your computer protect open programs and documents for about 4 minutes, allowing you to remove the depleted battery and replace it with a charged one. (The backup batteries maintain other kinds of information, including control panel settings such as the clock time, for up to two weeks after the main battery is discharged or removed.)

To remove or replace the main battery, follow these steps:

1Save your work, and then choose Sleep from the Special menu.

You can choose Shut Down instead of Sleep if you feel more comfortable working without the 4-minute time limit.

2Close the display.

3Open the battery door by pressing the small button and sliding the door in the direction indicated by the arrow.

The door is physically attached to the battery.

4 Carefully pull the battery out of its compartment.

Power Management

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Apple 280C manual Removing or replacing the battery, To remove or replace the main battery, follow these steps
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280C, 280 specifications

The Apple 280 and 280C are notable models in Apple's lineup that showcase the company's commitment to innovation and design. Launched as successors to earlier models, these computers were designed to cater to both professional and casual users, with features tailored for productivity, creativity, and seamless user experience.

One of the standout characteristics of the Apple 280 is its sleek and elegant design, which combines aesthetics with functionality. The lightweight chassis makes it easy to transport, appealing to users who are on the go. The display technology utilized in the Apple 280 models set a precedent for visual clarity and vibrancy, allowing users to experience richer colors and sharper images. The 280C model further enhanced this experience with a higher resolution, leading to more precise visuals that are perfect for graphic design and multimedia applications.

Under the hood, the Apple 280 and 280C are powered by robust processors that provide ample performance for demanding tasks. Multitasking is made smooth with sufficient RAM, enabling users to run multiple applications without sacrificing speed or efficiency. This level of performance is particularly advantageous for professionals in fields such as video editing, software development, and data analysis.

In terms of connectivity, the Apple 280 series is equipped with a range of ports that ensure compatibility with various peripherals, whether for personal use or professional setups. The inclusion of USB and Thunderbolt ports allows users to connect high-speed devices seamlessly, enhancing the overall productivity of the system.

Another hallmark of the Apple 280 series is the integration of advanced technologies that enhance user interaction. Features such as high-fidelity sound systems and responsive trackpads provide immersive experiences, whether users are listening to music, engaging in video calls, or navigating through applications.

Security also played a significant role in the design of the Apple 280 and 280C. These models incorporate the latest encryption technologies and secure boot processes, ensuring that user data remains protected against unauthorized access.

Overall, the Apple 280 and 280C stand as a testament to Apple's dedication to innovation, merging cutting-edge technology with user-friendly features to create devices that cater to a wide range of users. With a blend of powerful performance, elegant design, and advanced capabilities, these models have left a lasting impact on the computing landscape and continue to be relevant choices for many today.
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