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Rectangular black laptop battery with connector pins visible

GreenTechLLC

GreenTechLLC L21D3PG2 57Wh laptop battery for Lenovo ThinkPad L14 Gen 3 L15 Gen 3 C14 Gen 1

SKU CH-WNGB-MQ6Q1

57 Wh three-cell lithium-ion replacement battery for Lenovo ThinkPad L14 Gen 3, L15 Gen 3 and C14 Gen 1 models

  • Battery type3 Cell Lithium-Ion
  • Battery voltage rating11.52 V
  • Battery capacity4948MAH
  • Product colorBlack
  • Product typeBattery
  • Compatible withLENOVO THINKPAD L14 GEN 3, L14 GEN 3 21C1, L14 GEN 3 21C2, L
  • 57 Wh capacity supports longer work sessions away from power
  • 52 V 3-cell lithium-ion chemistry delivers stable voltage for consistent performance
  • Direct replacement for OEM part numbers including 5B11F21946 and L21D3PG2 ensures hassle-free installation
  • Tested for correct voltage, circuit protection and low self-discharge before shipping
  • CE FCC RoHS certified for electrical safety and environmental compliance

57Wh three-cell ThinkPad battery

GreenTechLLC supplies a new 57Wh lithium-ion replacement that matches the 11.52V and 4948mAh ratings of the original Lenovo packs. It fits ThinkPad L14 Gen 3, L15 Gen 3 and C14 Gen 1 models across the listed sub-variants. The black three-cell unit is built to the same physical envelope as the OEM batteries it replaces.

Steady discharge and circuit protection

Each cell is tested for stable current delivery and low self-discharge so the pack maintains voltage under continuous workloads rather than only in short bursts. On-board protection circuits guard against over-charge, over-discharge and short-circuit conditions during extended sessions. The pack carries CE, FCC and RoHS safety certifications confirming compliance with regulated limits.

Not for higher-capacity or different-voltage needs

Buyers who need a larger watt-hour rating or a different cell count cannot use this pack. It is also unsuitable for ThinkPad models outside the L14 Gen 3, L15 Gen 3 and C14 Gen 1 families listed in the compatibility data.

How it compares

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

Price $55.99
Pricier than about 86% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameGreenTech
Model name5B11F21941, 5B11F21946, 5B11F21953, 5B11H56342, 5B11H56343, 5B11H56344, 5B11M90003, 5B11M90004, 5B11M90005, 5B11M90006, 5B11M90007, 5B11M90008, L21C3PG2, L21D3PG2, L21M3PG2, SB11F21945, SB11F21947, SB11H56243, SB11H56244, SB11H56245
Part number5B11F21941, 5B11F21946, 5B11F21953, 5B11H56342, 5B11H56343, 5B11H56344, 5B11M90003, 5B11M90004, 5B11M90005, 5B11M90006, 5B11M90007, 5B11M90008, L21C3PG2, L21D3PG2, L21M3PG2, SB11F21945, SB11F21947, SB11H56243, SB11H56244, SB11H56245
Product colorBlack
Product typeBattery
Power
Battery type3 Cell Lithium-Ion
Battery voltage rating11.52 V
Battery capacity4948MAH
Compatibility
Compatible withLENOVO THINKPAD L14 GEN 3, L14 GEN 3 21C1, L14 GEN 3 21C2, L14 GEN 3 21C5, L14 GEN 3 21C6, L15 GEN 3, L15 GEN 3 21C3, L15 GEN 3 21C4, L15 GEN 3 21C7, L15 GEN 3 21C8, C14 GEN 1, C14 GEN 1 21C9, C14 GEN 1 21CA

Questions about this item

Does the 3-cell 11.52 V 4948 mAh pack run hot or draw extra power during all-day use?

The battery is tested for correct voltage, circuit protection and stable current, so it should not generate excess heat or draw more power than the original 57 Wh unit.

What must I already own for this GreenTech L21D3PG2 to work?

You need a compatible ThinkPad — L14 Gen 3, L15 Gen 3 or C14 Gen 1 — because the battery connects directly to the laptop's internal connector.

Will this 57 Wh replacement behave the same as the original battery in my older ThinkPad L14 Gen 3?

Yes, it matches the OEM specifications of 11.52 V and 4948 mAh, so charge reporting and runtime remain consistent with the factory pack.

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