Laptop battery Lenovo 5B11M05349 11.4V 45Wh

Replacement laptop battery Lenovo 5B11M05349 11.4V 45Wh is a direct-fit rechargeable battery designed to restore portable power to compatible Lenovo notebooks. With a nominal voltage of 11.4V and energy capacity of 45Wh, it replaces a depleted unit to extend runtime for everyday mobile tasks such as web browsing, document editing and light multimedia playback while maintaining the device's original form factor and connection interface.

Advantages

This Lenovo battery provides stable voltage output and rated capacity to help maintain predictable run times under typical usage. It is a plug-and-play replacement matched to the original battery compartment dimensions and connector type to ensure proper fit and safe charging behavior. Built to meet standard safety and performance expectations for laptop batteries, the unit supports repeated charge cycles and helps restore portability without requiring hardware modifications.

Key specifications

• Nominal voltage: 11.4 V
• Energy capacity: 45 Wh
• Battery type: rechargeable lithium-ion pack
• Form factor: direct-fit replacement for compatible Lenovo notebooks
• Typical use: mobile computing, office applications, light multimedia

How to use

Power the laptop off, disconnect the external power adapter and remove the old battery according to the notebook manufacturer's instructions. Insert the Lenovo 11.4V 45Wh replacement pack into the battery bay, ensuring the connector is aligned and the pack seats securely. Reconnect the AC adapter and boot the system; the operating system should recognize the new battery and display charge status. Perform a full charge cycle before extended use to calibrate charge reporting.

Recommendations

For safe operation, use the battery with compatible Lenovo models only, keep the battery at moderate temperatures, avoid exposure to moisture or physical damage, and follow the laptop manufacturer's charging and disposal guidelines. If the device shows abnormal heating or charging behavior, stop using the battery and seek professional inspection.