Internal 4-cell Lithium‑Ion Battery for Lenovo (model 5B11M90058)

Replacement internal 4-cell lithium-ion battery compatible with Lenovo laptops, model 5B11M90058. This internal battery is designed to restore portable power for devices that originally used the same OEM part, providing a straightforward way to regain laptop runtime and avoid unexpected shutdowns. The battery connects directly into the laptop’s internal compartment and is intended for systems that accept this battery specification.

Advantages

This internal 4-cell lithium-ion battery delivers a reliable power source with consistent voltage output and improved charge retention compared with heavily worn batteries. It is manufactured to match the physical form factor and connector alignment required by compatible Lenovo notebook models, enabling an easy replacement without modification to the host device. Using a new internal battery helps maintain system stability under load and supports portable use away from AC power.

Подходит для

• Replacement of a depleted or failing internal battery in compatible Lenovo laptops
• Extending mobile runtime for business travel, fieldwork or remote study
• Maintaining uptime for critical tasks where sudden power loss is unacceptable
• Servicing and refurbishment of Lenovo notebooks that accept the same internal battery form factor

Key specifications

• Cell type: lithium-ion, 4-cell configuration
• Intended installation: internal laptop battery designed for in-device mounting
• Form factor: OEM-compatible shape and connector for supported Lenovo models
• Typical use: replacement to restore original runtime and charging behavior

How to use

Power off the laptop and disconnect the AC adapter before beginning installation. Follow the device manufacturer’s disassembly instructions to access the internal battery compartment, remove the old battery by disconnecting the internal connector and detaching any mounting screws or clips, and then install the replacement battery by reversing the steps. Reconnect the battery connector firmly, secure any fasteners, reassemble the laptop chassis, and charge the battery fully before first use to allow proper calibration of charge reporting.

Usage recommendations

Use only as a direct replacement in Lenovo laptops that require this internal 4-cell lithium-ion battery specification. Avoid exposing the battery to water, extreme heat, or mechanical shock. For safety and longevity, charge and store the battery at moderate temperatures, avoid deep discharge when possible, and follow Lenovo’s service and disposal guidelines for lithium-ion batteries.