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Black rectangular 4-cell lithium-ion laptop battery with connector strip

GreenTechLLC

GreenTechLLC L21D4P72 4-cell 15.44V 3400mAh laptop battery

SKU CH-KK1P-4HYC5

4-cell lithium-ion battery delivering 15.44 V and 3400 mAh for ThinkPad P16s, T16 and L13 Gen 5 models

  • ColorBlack
  • TypeBattery
  • CompatibilityTHINKPAD L13 GEN 5, L13 GEN 5 21LC, P16S GEN 1, P16S GEN 1 2
  • Battery Type4 Cell Lithium-Ion
  • Battery Voltage15.44V
  • Battery Capacity3400mah
  • Reliable power for ThinkPad P16s and T16 models with 15.44V 3400mAh capacity
  • Lightweight 4-cell lithium-ion design at 0.7lbs fits easily in your bag
  • Tested for stable current and low self-discharge with CE FCC RoHS certification
  • Replaces multiple OEM part numbers including L21D4P72 L21L4P72 L21M4P73
  • Compatible with ThinkPad L13 Gen 5 P16s Gen 1 2 and T16 Gen 1 2

Replacement battery for ThinkPad P16s and T16

This 4-cell lithium-ion pack delivers 15.44V and 3400mAh for compatible Lenovo ThinkPad P16s Gen 1, Gen 2, T16 Gen 1 and Gen 2 models. It also fits the ThinkPad L13 Gen 5. The black housing measures 12.5 x 4.3 x 0.2 inches and weighs 0.7lbs.

Thermals noise and power draw

The battery operates at its rated 15.44V with a 52.2Wh capacity, supplying stable current and low self-discharge during normal use. It produces no audible noise and generates minimal heat while powering the laptop. Circuit protection guards against overcharge, over-discharge and short circuits.

Included certifications and testing

Each unit is tested for correct voltage, circuit protection and stable current before shipping. The pack carries CE, FCC and RoHS certifications for safety compliance. It replaces a long list of OEM part numbers including 5B10W51868, 5B10W51869, 5B10W51870, 5B10W51906, L21D4P72, L21L4P72 and L21M4P73. Buyers needing a higher-capacity pack or a different form factor should look elsewhere.

Highlights

  • Reliable power for ThinkPad P16s and T16 models with 15.44V 3400mAh capacity
  • Lightweight 4-cell lithium-ion design at 0.7lbs fits easily in your bag
  • Tested for stable current and low self-discharge with CE FCC RoHS certification
  • Replaces multiple OEM part numbers including L21D4P72 L21L4P72 L21M4P73
  • Compatible with ThinkPad L13 Gen 5 P16s Gen 1 2 and T16 Gen 1 2

Specifications

BrandGreenTech
ModelL21D4P72, L21L4P72, L21M4P73, SB10W51969, SB10W51970, SB11M89835, SB11M89836, SB11M89837, 5B10W51868, 5B10W51869, 5B10W51870, 5B10W51906, 5B11M90034, 5B11M90035, 5B11M90036
Part NumberL21D4P72, L21L4P72, L21M4P73, SB10W51969, SB10W51970, SB11M89835, SB11M89836, SB11M89837, 5B10W51868, 5B10W51869, 5B10W51870, 5B10W51906, 5B11M90034, 5B11M90035, 5B11M90036
ColorBlack
TypeBattery
CompatibilityTHINKPAD L13 GEN 5, L13 GEN 5 21LC, P16S GEN 1, P16S GEN 1 21CK, P16S GEN 1 21CL, P16S GEN 2, P16S GEN 2 21HK, P16S GEN 2 21HL, P16S GEN 2 21K9, P16S GEN 2 21KA, T16 GEN 1, T16 GEN 1 21CH, T16 GEN 1 21CJ, T16 GEN 2, T16 GEN 2 21HH, T16 GEN 2 21HJ, T16 GEN 2 21K7, T16 GEN 2 21K8
Battery Type4 Cell Lithium-Ion
Battery Voltage15.44V
Battery Capacity3400mah
Dimension12.5 x 4.3 x 0.2
Weight0.7lbs

Questions about this item

How do I install the L21D4P72 battery in a ThinkPad P16s Gen 1, and which step is often missed?

Power off, unplug the AC adapter, remove the base screws, detach the bottom cover, disconnect the old battery connector, fit the new 4-cell pack, reconnect the cable, replace the cover and screws, then power on to verify the 15.44V charge.

What maintenance will the 3400mAh 4-cell lithium-ion pack need later?

No user maintenance is required; when runtime drops below your needs, replace the whole pack with another L21D4P72 or compatible part number such as 5B10W51868.

What limit appears first during sustained use of the 52.5Wh battery?

The 3400mAh capacity sets the runtime ceiling; under continuous load the pack will deplete before any thermal or voltage threshold is reached.

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