Battery Fujitsu CP813266-XX for LIFEBOOK E548 E558 E448 E458 U748 U758

The Fujitsu CP813266-XX battery is designed as a direct replacement for Fujitsu LIFEBOOK models E548, E558, E448, E458, U748 and U758. With a nominal capacity of 3490 mAh, this battery restores mobile runtime and supports standard laptop workloads such as office applications, web browsing and light multimedia playback. It is intended to fit the original battery bay and maintain the power delivery characteristics expected for these LIFEBOOK models.

Advantages

This Fujitsu battery provides consistent power output and is manufactured to match the physical dimensions and electrical specifications of the original unit, enabling straightforward installation and stable operation. The capacity specification (3490 mAh) allows predictable runtime for typical productivity tasks, while the compatible design minimizes the need for adjustments or firmware changes. The battery is suitable for users seeking a like-for-like replacement to restore portable use.

Suitable for

• Replacing a worn or failing battery in Fujitsu LIFEBOOK E548, E558, E448, E458, U748 and U758
• Extending mobile runtime for office work and web browsing
• Maintaining original fit and connectors without modification

Key specifications

• Nominal capacity: 3490 mAh
• Compatibility: designed for specific Fujitsu LIFEBOOK E5xx and U7xx series models
• Form factor: replacement notebook battery sized for the original bay
• Typical use: supports everyday productivity, internet and light multimedia tasks

How to use

Before installation, power down the laptop and disconnect any external power sources. Remove the old battery following the LIFEBOOK service instructions or user manual, then insert the replacement battery ensuring connectors are aligned and the unit seats fully in the battery compartment. After first installation, charge the battery to full capacity using the laptop charger. Observe the operating system battery status indicators to confirm proper recognition and charging behavior.

Recommendations

For optimal battery life, cycle the battery periodically and avoid long-term storage at full charge or at deep discharge. Use the original or manufacturer-recommended charger and avoid exposing the battery to extreme temperatures. If you notice significant capacity loss or abnormal behavior, refer to Fujitsu support or a qualified technician for inspection.