Laptop battery Lenovo 5B11N52048 3-cell 57Wh 11.52V

Replacement laptop battery Lenovo 5B11N52048 is a 3-cell internal battery with a nominal energy capacity of 57Wh and a rated voltage of 11.52V. It is designed as a direct substitute for compatible Lenovo notebooks to restore portable runtime and maintain device mobility. The battery provides a factory-spec power source intended for users who need a spare or replacement cell pack to continue work, travel, or everyday tasks without relying on mains power.

Advantages

This battery delivers the original form factor and electrical characteristics suited for compatible Lenovo laptops, supporting stable voltage output and predictable discharge behavior. With a 57Wh capacity and three cells, it balances energy density and weight to offer a practical runtime improvement over worn-out or degraded batteries. The construction meets standard quality and safety expectations for laptop internal packs and is intended to fit securely into the designated battery bay for straightforward replacement.

Suitable for

• Replacing an aged or failing internal battery in compatible Lenovo notebooks
• Keeping a laptop operational during travel, meetings, or remote work
• Maintaining productivity when access to a power outlet is limited
• Using as a spare battery to extend cumulative daily runtime

Key specifications

• Cell count: 3-cell configuration
• Nominal energy capacity: 57Wh
• Rated voltage: 11.52V
• Form factor: internal laptop battery designed for direct replacement
• Compatibility: intended for compatible Lenovo notebook models requiring this voltage and form factor

How to use

Power down the laptop and disconnect any external power source before attempting replacement. Remove the old battery following the notebook manufacturer's instructions—typically by unlocking and sliding out the internal pack or by removing the base cover if the battery is serviceable internally. Insert the replacement battery into the battery bay, secure any latches or screws, and reconnect power. Allow the new battery to charge fully before first heavy use to calibrate the battery management system and obtain accurate runtime estimation.

Recommendations

For safe and optimal performance, use the battery at moderate ambient temperatures, avoid exposing it to moisture or physical impact, and follow the laptop manufacturer's charging guidelines. If the laptop will be stored for an extended period, charge the battery to approximately 40–60% and store in a cool, dry place. Dispose of the spent battery at an authorized recycling facility in accordance with local regulations.