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Rectangular black lithium-ion laptop battery with connector plug

KingSener

KingSener L20M4P73 54.7Wh laptop battery for ThinkPad X13 Gen 2/3

SKU CH-6XY9-64JVB MPN L20M4P73

54.7 Wh lithium-ion replacement battery fits ThinkPad X13 Gen 2 and Gen 3 models

  • Battery voltage rating15.36 V
  • Battery capacity3,564 mAh / 54.7WH
  • 7 Wh capacity extends work time between charges
  • 36 V output matches original ThinkPad specifications
  • Premium Li-ion cells maintain reliable performance over cycles
  • 224 g lightweight design keeps X13 portable
  • Replaces multiple OEM part numbers for Gen 2 and Gen 3

Compatible ThinkPad X13 Generations

This KingSener L20M4P73 battery is built for Lenovo ThinkPad X13 Gen 2 (2021) and Gen 3 (2022) across all configurations. It replaces OEM part numbers L20M4P73, L20D4P73, L20C4P73 and L20D3P72. The 54.7Wh capacity matches the original specification. Premium Li-ion cells deliver reliable mobile power.

Who Should Choose This

Owners of a ThinkPad X13 Gen 2 or Gen 3 needing a direct 15.36V replacement will find the correct fit and connector. Users of other ThinkPad models, different X13 generations or non-Lenovo laptops should look elsewhere because the part numbers and pin-out will not match. The 224g weight keeps the ultraportable profile intact.

Build Integration

The battery slots into the internal compartment without adapters or cable changes. It draws charge from the existing AC adapter and works with the laptop's built-in power management. No BIOS update or driver installation is required. The black finish matches the chassis and the lightweight design preserves the original balance.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $33.99
Pricier than about 60% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingSener
Model nameL20M4P73 / L20D4P73
Part numberPrimary: L20M4P73, L20D4P73, L20C4P73, L20D3P72
OEM Numbers: SB10W51919, SB10W51920, SB10W51921
FRU Numbers: 5B10W51817, 5B10W51818, 5B10W51819, 5B10W51820
Power
Battery voltage rating15.36 V
Battery capacity3,564 mAh / 54.7WH

Questions about this item

Will the L20M4P73 fit my ThinkPad X13 Gen 2 without any extra parts?

Yes — the battery is a direct replacement for the original L20M4P73, L20D4P73, L20C4P73 or L20D3P72 packs used in every ThinkPad X13 Gen 2 configuration.

Can I keep using my original 15.36 V charger with this 54.7 Wh replacement?

The pack operates at the same 15.36 V as the factory unit, so your existing charger will charge it normally.

How do I confirm the new battery is recognised correctly after installation?

Power on the laptop; Lenovo Vantage or the BIOS power tab should show the model L20M4P73, 54.7 Wh capacity and a healthy charge cycle count.

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