Battery for Lenovo laptops 45Wh 11.1V 3-cell lithium-ion, model 5B11B36283

Replacement battery for compatible Lenovo laptops with 45Wh capacity and a nominal voltage of 11.1V. This 3-cell lithium‑ion battery (model 5B11B36283) is intended as a direct substitute where physical dimensions and electrical specifications match the original unit. It is designed to restore portable power for everyday mobile use, providing runtime suitable for office tasks, web browsing and light multimedia playback.

Advantages

The battery offers a 45Wh energy capacity that balances runtime and weight for mobile productivity. Its 11.1V nominal voltage ensures compatibility with systems that expect a 3-cell Li‑ion pack. As a replacement unit, it returns a worn or failed battery to service without requiring hardware changes. The lithium‑ion chemistry provides stable voltage output and no memory effect when charged according to manufacturer guidelines.

Suitable for

• Office productivity: word processing, spreadsheets, email
• Internet browsing and cloud applications
• Light multimedia: video streaming and music playback
• On‑the‑go use where original battery specifications match

Key specifications

• Nominal energy: 45Wh
• Nominal voltage: 11.1V
• Cell count: 3 cells (lithium‑ion)
• Chemistry: Lithium‑ion (Li‑ion)
• Form factor: laptop internal replacement battery

How to use

Power the laptop off and disconnect any external power source before removing the existing battery. Follow the laptop manufacturer's service instructions to access and replace the internal battery, ensuring connectors are aligned and secured. After installation, charge the new battery fully before first use to calibrate charge level reporting. Use the laptop's power management settings to optimise runtime and battery health.

Usage recommendations

For reliable operation, use this battery only in laptop models that match the pack’s voltage, capacity and physical interface. Avoid exposing the battery to extreme temperatures, moisture, or mechanical shock. Charge with the original or compatible charger and follow standard lithium‑ion handling and disposal guidelines.