Battery Lenovo 38Wh 2-cell lithium-ion 5B11N45996 for compatible laptops

Replacement Lenovo 38Wh 2-cell lithium-ion battery designed for compatible Lenovo laptops. This compact battery delivers 38 watt-hours of capacity in a two-cell configuration, providing a practical balance between runtime and size. It supports standard charging and integrates with OEM power management to maintain accurate charge reporting and safe operation on supported systems.

Advantages

The battery offers a straightforward swap-in replacement for worn or aging batteries, restoring portable run time while keeping the original power management behavior. Its 38Wh capacity is suitable for everyday tasks without significantly increasing device weight or bulk. Built to meet lithium-ion safety and performance norms, it enables consistent charging cycles and stable voltage delivery for typical laptop workloads.

Suitable for

• Replacing a depleted or failing internal battery in compatible Lenovo laptops
• Extending mobile usage time for productivity, study or light entertainment
• Carrying as a spare battery for travel or fieldwork where outlet access is limited

Key specifications

• Type: Lithium-ion, 2-cell
• Rated capacity: 38 Wh
• Configuration: Compact 2-cell pack suitable for internal laptop bays
• Compatibility: Designed for use in compatible Lenovo notebook models that accept this form factor and connector
• Charging: Supports standard laptop charging circuits and OEM power-management integration
• Weight and dimensions: small, lightweight pack intended to minimize added bulk

How to use

Power down the laptop and disconnect any external power source before replacing the battery. Remove the back cover or battery access panel according to the laptop manufacturer’s instructions, then carefully disconnect the old battery from the internal connector and remove any retaining screws or clips. Install the replacement battery by seating it in the bay, fastening any screws or clips, and reconnecting the internal connector. Reassemble the cover, reconnect external power, and allow the system to recognize the new battery. It is recommended to calibrate the battery charge indicator by charging to full and then allowing a discharge cycle if the operating system suggests recalibration.

Recommendations

Use the battery only in compatible Lenovo laptops and follow the device manufacturer’s guidelines for installation and charging. Avoid exposing the battery to extreme temperatures, direct heat sources, or moisture. For storage, keep the battery at partial charge in a cool, dry place. Replace the battery if you observe swelling, excessive heat during charge, unusual odor, or rapidly decreasing runtime.