Sisäinen litiumioni-kannettava-akku Lenovo 57Wh 5B11M90005

Replacement internal lithium‑ion battery for Lenovo laptops, model 5B11M90005 with 57Wh capacity. This internal battery is designed to restore portable power to compatible Lenovo notebook models, providing nominal 57Wh energy storage to extend runtime for mobile work, travel, and everyday use. Intended as a direct swap for the original internal battery, the module replaces worn cells and restores expected battery backup without altering device function.

Advantages

The Lenovo 57Wh internal lithium‑ion battery provides a balance of energy density and compact size to fit internal battery bays of compatible notebooks. It offers steady voltage output and consistent discharge characteristics typical of lithium‑ion chemistry, helping to recover factory runtime. As a direct-replacement internal module, it preserves original form factor and connector compatibility when used in supported models, enabling a straightforward replacement process and avoiding the need for external battery packs.

Suitable for

• Restoring battery life in compatible Lenovo laptops
• Mobile productivity during travel or commuting
• Extending unplugged usage for office and classroom tasks
• Replacing worn or failing internal battery cells

Key specifications

• Battery type: lithium‑ion (Li‑ion)
• Nominal capacity: 57 Wh
• Form factor: internal laptop battery module
• Typical use: rechargeable power source for notebook operation
• Compatibility: designed for specific Lenovo notebook models that accept this internal battery form factor

How to use

Power down the laptop, disconnect external power and remove any access panels according to the manufacturer service instructions. Replace the existing internal battery with this module by disconnecting the battery cable and securing the new battery in the original mounting position; reconnect the cable and reassemble the device. After installation, charge the battery fully before first use and verify battery status through the operating system or BIOS battery diagnostics. Follow Lenovo's service guidelines for safe handling and battery replacement procedures.

Recommendations

Use this internal battery only in compatible Lenovo notebook models and follow manufacturer safety instructions. Avoid exposure to high heat, liquids, and physical damage. Recycle or dispose of the old battery in accordance with local regulations for lithium‑ion cells. If unsure about compatibility or installation steps, consult official Lenovo service documentation or authorized service personnel.