Laptop battery Lenovo 3-cell 41Wh Li-Ion 3560mAh model 5B11M90074

Laptop battery Lenovo 3-cell 41Wh Li-Ion 3560mAh model 5B11M90074 is a replacement internal battery designed to restore portable power to compatible Lenovo notebooks. It provides a nominal capacity of 41Wh (3560mAh) and uses lithium-ion chemistry to deliver steady voltage for typical everyday tasks such as web browsing, office applications and video playback. The battery is intended as a direct swap for worn or degraded original batteries to extend usable time between charges and bring the device back to standard runtime.

Advantages

This Lenovo 3-cell 41Wh Li-Ion battery offers a compact form factor and balanced energy density suitable for slim notebook designs. Its nominal 3560mAh capacity provides predictable operating time under standard load conditions, and lithium-ion cells ensure consistent discharge characteristics and recharge behavior. As a purpose-made replacement, it fits specified Lenovo models without modification and restores mobile usability without requiring additional components.

Suitable for

• Replacing a worn or failing internal battery in compatible Lenovo laptops
• Extending runtime for everyday tasks such as web browsing and office work
• Restoring battery performance prior to travel or field work where mains power is unavailable
• Maintaining a secondary battery on hand for maintenance or service operations

Key specifications

• Cell count: 3-cell configuration
• Rated energy: 41 Wh
• Capacity: 3560 mAh
• Chemistry: Lithium‑ion (Li‑Ion)
• Intended use: Internal rechargeable laptop battery
• Typical applications: General productivity, web browsing, media playback

How to use

Power down the laptop and disconnect any external power source before starting the replacement. Remove the service cover or bottom panel according to the laptop manufacturer’s instructions, taking appropriate electrostatic discharge precautions. Detach the existing battery connector carefully and remove the old battery. Install the replacement battery in the same orientation, reconnect the battery cable securely and replace the cover. Reconnect mains power and charge the battery fully before first use to allow the battery management system to calibrate.

Recommendations

Operate and charge the battery within the laptop manufacturer’s specified temperature and charging parameters. For longest service life, avoid prolonged storage at full charge or at very low charge; store the battery at around 40–60% charge if not in use for extended periods. Dispose of worn batteries according to local electronic waste regulations.