Lenovo Thinkpad T440p T450P X240 57+ Laptop Battery

The Lenovo ThinkPad Battery 57+ is a premium 6-cell external replacement battery engineered specifically for selected high-performance ThinkPad models, including the T440p, T540p, W540, and W541 mobile workstations. Incorporating a robust 10.8V/11.1V architecture and top-tier lithium-ion cylindrical cells, it supplies high-density power capacity, efficient thermal operation, and optimal system runtimes under heavy computational loads. Outfitted with advanced safety circuitry, this drop-in replacement protects against unexpected overcharging, over-current, and short-circuit faults to ensure completely safe daily operation. Designed to match strict physical OEM specifications, the 57+ battery locks securely into place without the use of tools, effortlessly restoring the mobile independence, reliability, and productivity of your workstation system.

Features

• Premium Grade-A cylindrical cells deliver a stable, reliable voltage drop for heavy multi-threaded development and engineering workflows.

• High capacity metrics match original factory standards to sustain demanding CPU/GPU hardware configurations.

• Integrated hardware protection circuit prevents overcharging, over-discharging, overheating, and short circuits.

• Built-in authentication chip ensures 100% full compatibility with Lenovo firmware and system power management utilities.

• Direct-fit external structural housing matches the rear alignment rail profile of heavy-duty ThinkPad systems perfectly.

• Tool-free external slide-and-snap installation utilizing dual spring-loaded release locks.

Key Specifications

• Battery Model: 57+ (Standard 6-Cell) or 57++ (Extended 9-Cell)

  Lenovo Support

• Battery Type: Lithium-Ion (Li-Ion)

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• Cells: 6-Cell (57+) / 9-Cell (57++)

  UAEBattery

• Voltage: 10.8V / 11.1V

  UAEBattery

• Capacity: 57Wh / 4400mAh (6-Cell) or 100Wh / 8400mAh (9-Cell variant)

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• Color: Black

• Condition: Brand New Replacement Battery

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• Rechargeable: Yes

  mutonic.com

Compatible Laptop Models

• Lenovo ThinkPad T440p (Performance Model)

• Lenovo ThinkPad T540p

• Lenovo ThinkPad W540 Mobile Workstation

• Lenovo ThinkPad W541 Mobile Workstation

• Lenovo ThinkPad L440 Series

• Lenovo ThinkPad L540 Series

Compatible Part Numbers

• 0C52863 (57+)

  mutonic.com

• 0C52864 (57++)

  Laptop Battery Express

• 45N1144

  UAEBattery

• 45N1145

  UAEBattery

• 45N1146

  eBay

• 45N1147

  UAEBattery

• 45N1148

  Laptop Battery Express

• 45N1149

  UAEBattery

• 45N1151

  UAEBattery

• 45N1153

  SO-Computertechnik

• 45N1158

  UAEBattery

• 3ICR19/65-2

  Laptop Battery Express