Lenovo 45Wh 3-Cell Li-Ion Internal Battery (5B11H56351) for ThinkPad L14/L15, P14s/P15s, T14/T15 Gen 2

When your ThinkPad L14 Gen 2, T14 Gen 2, or P14s Gen 2 no longer holds a charge through a full workday, this Lenovo internal battery (5B11H56351) restores dependable power. It is a direct replacement for the original 3-cell lithium-ion unit, fitting inside the chassis without extra cables or brackets.

Key specifications

• Battery technology: Lithium-Ion (Li-ion)
• Capacity: 45 Wh / 3910 mAh
• Voltage: 11.52 V
• Number of cells: 3
• Colour: Black
• Compatible models: Lenovo ThinkPad L14 Gen 2, L15 Gen 2, P14s Gen 2, P15s Gen 2, T14 Gen 2, T15 Gen 2
• Compatible battery part numbers: L20C3PF0, L20M3PF0, L20L3PF0, L20D3PF0
• Rechargeable: Yes
• Condition: New

Why choose it

This battery is built to Lenovo specifications and matches the original part number, ensuring correct voltage and connector alignment. The 45 Wh capacity provides a balance of runtime and weight for mobile professionals, while the 3-cell design keeps the laptop slim.

Ideal use cases

• Replacing a worn-out battery in a corporate ThinkPad fleet
• Restoring battery life for remote workers who rely on their laptop all day
• Keeping a spare battery for travel or extended use away from power outlets

Good to know

Installation requires opening the laptop case; the battery is internal and not hot-swappable. Always power off and disconnect the AC adapter before replacement.