Battery Lenovo 3-cell 42Wh lithium-ion 5B11M89998 replacement for compatible Lenovo laptops

Replacement lithium‑ion battery compatible with select Lenovo laptops, designed as a 3-cell pack with a 42Wh rated capacity. The battery restores mobile power for everyday tasks and is intended as a direct swap for worn or faulty units in compatible notebook models. It provides a compact, lightweight solution to extend unplugged runtime for office work, web browsing and light multimedia use.

Advantages

This 3-cell, 42Wh lithium‑ion battery offers a balanced combination of energy density and size to maintain a slim laptop profile while increasing run time between charges. It is manufactured to meet standard safety and performance expectations for replacement laptop batteries and is suitable for users who need a straightforward, OEM-compatible power pack. The battery’s capacity supports typical productivity workflows without significantly adding weight or bulk.

Suitable for

• Everyday office applications and document editing
• Web browsing and online meetings
• Light multimedia playback (video and music)
• Replacing degraded or non-working original batteries

Key specifications

• Battery chemistry: lithium‑ion (Li‑ion)
• Cell configuration: 3‑cell pack
• Capacity: 42 Wh
• Form factor: laptop internal replacement pack
• Typical use: supports notebook portable operation for standard productivity tasks

How to use

Power down the laptop and disconnect the power adapter before replacing the battery. Remove the service hatch or bottom cover according to the laptop manufacturer’s instructions, then carefully unplug the old battery and install the replacement pack in the same orientation. Reattach the connector and secure the cover or hatch. After initial installation, charge the battery fully before normal use to allow the battery management system to calibrate. Follow the laptop manufacturer’s guidelines for safe battery handling and disposal of the old battery.

Recommendations

For best performance, avoid exposing the battery to high temperatures, store it at partial charge if not used for extended periods, and use the laptop’s power management settings to optimize runtime. Replace batteries that show swelling, overheating, or rapid capacity loss and follow local regulations for recycling used lithium‑ion batteries.