Replacing the backup battery

In addition to its main battery, your computer has a small backup battery that maintains the contents of RAM while you replace the main battery.

The backup battery usually lasts for several years. You may need to have it replaced if you notice that some of your system settings changed after you removed or replaced the main battery. (You may notice, for example, that the clock time is different.) By replacing the backup battery you can preserve the contents of RAM the next time you change the main battery.

Your computer’s backup battery must be replaced by an Apple-authorized service provider.

Reconditioning the battery

To maximize battery life, you should recondition the battery once every 30 days.

If you own a PowerBook Duo 280 or 280c

If you have a PowerBook Duo 280 or 280c, you can extend your battery’s life by reconditioning your battery once every 30 days using the Battery Reconditioning program, which is on the system software disk labeled Disk Tools. You may want to keep a copy of the Battery Reconditioning program on your hard disk so it is more convenient to use every 30 days.

IMPORTANT It takes 2 hours to run the Battery Reconditioning program and about 2 hours to fully charge your battery in your PowerBook. During the time you are reconditioning your battery (and recharging it if you don’t have a recharger), you cannot use your PowerBook. Plan to recondition your battery when you won’t need your PowerBook for at least 4 hours.

To recondition a battery, follow these steps:

1Plug in your PowerBook using your AC power adapter.

If you have already copied the Battery Reconditioning program on your hard disk, skip step 2 and do step 3 next.

2Insert Disk Tools in the floppy disk drive and turn on your PowerBook.

Power Management

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.

Apple 280C manual Replacing the backup battery, Reconditioning the battery

Models: 280C 280