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Black rectangular lithium-ion laptop battery, 63Wh 11.64V

Beisite

Beisite L21M3P76 L21B3P73 63Wh laptop battery

SKU CH-Z11C-C1JN8

63 Wh lithium-ion replacement battery for Lenovo ThinkPad L14 and L15 Gen 3 models

  • ColorBlack
  • TypeBattery
  • Battery TypeLithium-Ion
  • Battery Voltage11.64V
  • Battery Capacity63Wh
  • 63Wh capacity powers Lenovo ThinkPad L14 Gen 3 and L15 Gen 3 models
  • 64V lithium-ion chemistry matches original part numbers L21M3P76 and L21B3P73
  • Replaces multiple OEM part numbers including 31CP6/54/90 and SB10W52008
  • Compatible with ThinkPad C14 Gen 1 and various L14/L15 sub-models 21C1 through 21C8
  • New condition battery includes 12-month manufacturer warranty

Direct replacement for ThinkPad L14 and L15 Gen 3

This 63 Wh lithium-ion battery replaces part numbers L21M3P76, L21B3P73 and 31CP6/54/90. It fits ThinkPad L14 Gen 3 models 21C1, 21C2, 21C5, 21C6 and ThinkPad L15 Gen 3 models 21C3, 21C4, 21C7, 21C8, plus ThinkPad C14 Gen 1 models 21C9 and 21CA. The pack operates at 11.64 V and ships new in black.

Suits owners restoring original runtime on listed

Buyers with ThinkPad L14 or L15 Gen 3 machines matching the part numbers above can install this unit directly. It is not for users of earlier ThinkPad generations, other L-series models, or non-Lenovo laptops. Systems requiring a different voltage, capacity or physical layout will not accept this pack.

63 Wh capacity restores factory-level runtime

The 63 Wh rating matches the original specification for the supported models, delivering comparable battery life for office work, web browsing and video playback. Runtime will decrease under heavy multi-core loads, sustained gaming or maximum screen brightness. Users needing extended off-grid operation should consider carrying a second pack.

Highlights

  • 63Wh capacity powers Lenovo ThinkPad L14 Gen 3 and L15 Gen 3 models
  • 64V lithium-ion chemistry matches original part numbers L21M3P76 and L21B3P73
  • Replaces multiple OEM part numbers including 31CP6/54/90 and SB10W52008
  • Compatible with ThinkPad C14 Gen 1 and various L14/L15 sub-models 21C1 through 21C8
  • New condition battery includes 12-month manufacturer warranty

Specifications

BrandL21M3P76 L21B3P73
ModelL21M3P76 L21B3P73
Part Number31CP6/54/90
ColorBlack
TypeBattery
Battery TypeLithium-Ion
Battery Voltage11.64V
Battery Capacity63Wh

Questions about this item

Which ThinkPad model must I already own for the L21M3P76 L21B3P73 63Wh battery to fit?

This battery fits Lenovo ThinkPad L14 Gen 3 (21C1, 21C2, 21C5, 21C6), ThinkPad L15 Gen 3 (21C3, 21C4, 21C7, 21C8) and ThinkPad C14 Gen 1 (21C9, 21CA).

Will the 11.64V 63Wh pack work with the original charger and power-management firmware on my ThinkPad L14 Gen 3?

Yes, the replacement matches the factory voltage and capacity, so the existing AC adapter and Lenovo power firmware recognise it normally.

How can I confirm the new battery is recognised and charging correctly after installation?

Power on the laptop, open Lenovo Vantage or the Windows battery report and verify the design capacity shows 63Wh, the voltage reads 11.64V and the status changes to charging when the adapter is attached.

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