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Rectangular black laptop battery with four cells and label details

PowerWarehouse

PowerWarehouse L21M4P74 4 Cell 15.44v 5570mah laptop battery

SKU CH-5CZJ-SW5KN

Four-cell lithium-ion replacement battery rated 15.44 V and 5570 mAh for ThinkPad P16s Gen 1, P16s Gen 2, T16 Gen 1 and T16 Gen 2

  • CompatibilityTHINKPAD P16S GEN 1, P16S GEN 1 21BT, P16S GEN 1 21BU, P16S
  • Battery Type4 Cell Lithium-Ion
  • Reliable power for ThinkPad P16s Gen 1 and Gen 2 models
  • Compatible with ThinkPad T16 Gen 1 and Gen 2 series
  • Replaces multiple OEM part numbers including 5B10W51871 and 5B11M90037
  • 4-cell lithium-ion design delivers 15.44 V and 5570 mAh capacity
  • Brand-new condition ensures full performance from first use

PowerWarehouse 4 Cell 15.44v Laptop Battery

This replacement battery fits ThinkPad P16s Gen 1 and Gen 2 models as well as T16 Gen 1 and Gen 2 systems. It matches OEM part numbers including 5B10W51871, 5B11M90037, L21D4P72 and L21M4P74. The unit is supplied new and ready to install.

5570mAh Capacity and 15.44v Output

The lithium-ion pack delivers 5570mAh at 15.44v across four cells. Runtime will vary with workload, screen brightness and power-management settings. Capacity decreases gradually with charge cycles and age.

Verify Your Exact Model Before Ordering

Check the service tag or bottom case sticker for the precise machine type such as 21BT, 21BU, 21CK, 21CL, 21HK, 21HL, 21K9, 21KA, 21CH, 21CJ, 21HH, 21HJ, 21K7 or 21K8. This battery does not support other ThinkPad series or non-listed sub-models.

Highlights

  • Reliable power for ThinkPad P16s Gen 1 and Gen 2 models
  • Compatible with ThinkPad T16 Gen 1 and Gen 2 series
  • Replaces multiple OEM part numbers including 5B10W51871 and 5B11M90037
  • 4-cell lithium-ion design delivers 15.44 V and 5570 mAh capacity
  • Brand-new condition ensures full performance from first use

Specifications

Part Number5B10W51871, 5B11M90037, L21D4P72, SB11M89837, 5B10W51872, 5B11M90038, L21M4P74
CompatibilityTHINKPAD P16S GEN 1, P16S GEN 1 21BT, P16S GEN 1 21BU, 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

Questions about this item

Which OEM part number matches my ThinkPad P16s Gen 1 or T16 Gen 2?

This battery replaces OEM numbers 5B10W51871, 5B10W51872, 5B10W51873, 5B11M90036, 5B11M90037, 5B11M90038, 5B11M90039, L21C4P72, L21D4P72, L21M4P74, SB10W51972, SB10W51973, SB11M89837 and SB11M89839.

What does the 15.44 V 5570 mAh rating deliver in my laptop?

The 15.44 V 5570 mAh lithium-ion pack supplies the voltage and capacity your ThinkPad P16s or T16 expects, restoring original run-time when the factory cell wears out.

What connector standard does the L21M4P74 use and what does it limit?

It uses the proprietary ThinkPad internal battery connector keyed for P16s Gen 1, P16s Gen 2, T16 Gen 1 and T16 Gen 2, so it only fits those chassis.

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