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Black rectangular laptop battery with connector strip

GreenTechLLC

GreenTechLLC L21M4P74 86Wh laptop battery for Lenovo ThinkPad P16s T16 Gen 1 2

SKU CH-CGQ2-WJA8A

An 86Wh lithium-ion replacement battery for Lenovo ThinkPad P16s and T16 Gen 1 and Gen 2 models

  • ColorBlack
  • TypeBattery
  • CompatibilityLENOVO THINKPAD P16S GEN 1, THINKPAD P16S GEN 1 21BT, THINKP
  • Battery Type4 Cell Lithium-Ion
  • Battery Voltage15.44V
  • Battery Capacity5570mah
  • 86Wh capacity powers extended work sessions away from the desk
  • 4-cell lithium-ion design balances runtime with a slim 12.5 x 4.5 x 0.25 cm profile
  • 44V output matches original Lenovo specifications for stable performance
  • Tested for correct voltage, circuit protection and low self-discharge before shipping
  • Certified to CE, FCC and RoHS safety standards for peace of mind

Direct replacement for ThinkPad P16s and T16

This 86 Wh lithium-ion battery replaces the original Lenovo packs used in ThinkPad P16s Gen 1, Gen 2 and T16 Gen 1, Gen 2 models. It matches the OEM part numbers L21M4P74, L21C4P72, L21D4P72 and the 5B10W51871 series. The four-cell design delivers 15.44 V and 5570 mAh for mobile professionals who need a fresh power source.

Steady output during long work sessions

The cell chemistry is tested for stable current and low self-discharge, so voltage remains consistent across a full discharge cycle rather than dropping sharply after a short burst. CE, FCC and RoHS certifications confirm the protection circuitry meets safety standards for continuous operation in business laptops.

Cool, quiet operation with minimal weight

At 0.95 lb and a slim 0.25 in profile, the pack adds negligible bulk to the chassis and produces no audible noise. Power draw follows the laptop’s own management, so thermals stay within the system’s normal envelope without extra cooling requirements.

Highlights

  • 86Wh capacity powers extended work sessions away from the desk
  • 4-cell lithium-ion design balances runtime with a slim 12.5 x 4.5 x 0.25 cm profile
  • 44V output matches original Lenovo specifications for stable performance
  • Tested for correct voltage, circuit protection and low self-discharge before shipping
  • Certified to CE, FCC and RoHS safety standards for peace of mind

Specifications

BrandGreenTech
ModelL21C4P72, L21D4P72, L21M4P74, SB10W51972, SB10W51973, SB11M89837, SB11M89839, 5B10W51871, 5B10W51872, 5B10W51873, 5B11M90036, 5B11M90037, 5B11M90038, 5B11M90039
Part NumberL21C4P72, L21D4P72, L21M4P74, SB10W51972, SB10W51973, SB11M89837, SB11M89839, 5B10W51871, 5B10W51872, 5B10W51873, 5B11M90036, 5B11M90037, 5B11M90038, 5B11M90039
ColorBlack
TypeBattery
CompatibilityLENOVO THINKPAD P16S GEN 1, THINKPAD P16S GEN 1 21BT, THINKPAD P16S GEN 1 21BU, THINKPAD P16S GEN 1 21CK, THINKPAD P16S GEN 1 21CL, THINKPAD P16S GEN 2, THINKPAD P16S GEN 2 21HK, THINKPAD P16S GEN 2 21HL, THINKPAD P16S GEN 2 21K9, THINKPAD P16S GEN 2 21KA, THINKPAD T16 GEN 1, THINKPAD T16 GEN 1 21CH, THINKPAD T16 GEN 1 21CJ, THINKPAD T16 GEN 2, THINKPAD T16 GEN 2 21HH, THINKPAD T16 GEN 2 21HJ, THINKPAD T16 GEN 2 21K7, THINKPAD T16 GEN 2 21K8
Battery Type4 Cell Lithium-Ion
Battery Voltage15.44V
Battery Capacity5570mah
Dimension12.5 x 4.5 x 0.25
Weight0.95 lb

Questions about this item

How much heat does the 15.44 V 86 Wh battery produce during all-day use?

The 4-cell lithium-ion pack runs at 15.44 V and 86 Wh; it generates only normal operational warmth and has built-in circuit protection to keep temperatures stable.

What must I already own to install the L21M4P74 battery?

You need a compatible ThinkPad P16s Gen 1 or 2, or T16 Gen 1 or 2, plus a small Phillips screwdriver to remove the bottom case and disconnect the old pack.

Will the 5570 mAh replacement work alongside the original 65 W charger I kept?

Yes, the 15.44 V 86 Wh cell charges normally from the standard 65 W USB-C adapter supplied with the ThinkPad P16s and T16 models.

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