Internal Lithium-ion Battery Lenovo 5B11M90028 11.1V 2600mAh

Internal Lithium‑ion battery Lenovo 5B11M90028 with nominal voltage 11.1V and capacity 2600mAh is a rechargeable internal battery designed to replace depleted batteries in compatible Lenovo laptop models. It restores portable power to the device and is intended for installation inside the laptop following the manufacturer's service instructions. The battery uses lithium‑ion chemistry and provides stable voltage suitable for systems that accept an 11.1V internal pack with a 2600mAh rated capacity.

Advantages

This internal lithium‑ion pack offers a balance between energy density and size, enabling extended run time without significantly increasing weight. The rated 11.1V voltage and 2600mAh capacity deliver predictable power delivery for common office, study and travel use. As a direct-replacement internal battery, it integrates with original charging circuitry when installed correctly and helps restore the laptop's nominal operating time compared with a depleted battery.

Suitable for

• Replacing a worn or failed internal battery in compatible Lenovo laptops
• Restoring mobile run time for work, study or travel
• Maintenance or refurbishment of laptops used in fleets or shared environments

Key specifications

• Cell chemistry: Lithium‑ion
• Nominal voltage: 11.1 V
• Rated capacity: 2600 mAh
• Form factor: Internal laptop battery pack
• Typical applications: Portable computer power source

How to use

Power down the laptop, disconnect external power, and follow the laptop manufacturer's disassembly and battery replacement instructions to access and replace the internal battery. Handle the battery carefully, avoid puncturing or crushing the pack, and reconnect connectors as specified. After installation, charge the battery fully using the original charger and allow the system to perform any battery calibration routines recommended by the laptop manufacturer.

Recommendations

Use this internal battery only in laptop models that are specified to accept an 11.1V 2600mAh internal pack. Observe safety guidelines: avoid exposure to high temperatures, keep the battery dry, and do not disassemble. Recycle depleted batteries at an appropriate collection point according to local regulations.