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Rectangular black lithium-ion laptop battery pack

Beisite

Beisite L20M4P75 L20D4P75 90Wh laptop battery

SKU CH-MQNG-DMP0J

90 Wh lithium-ion battery for ThinkPad P1 G4 series, 15.52 V or 15.48 V

  • Battery typeLithium-Ion
  • Battery voltage rating15.52 V/15.48 V
  • Battery capacity90 Wh/90.1 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor ThinkPad P1 G4 Series
  • Up to 90Wh capacity powers demanding workloads through the day
  • Direct fit for ThinkPad P1 G4 series models including 20Y3 variants
  • Replaces original part numbers SB11B79215, SB11B79216, 5B11B79217, 5B11B79218 and 41CP5/56/142
  • Lithium-ion chemistry at 15.52V/15.48V delivers stable voltage under load
  • Brand-new cell pack backed by 12-month manufacturer warranty

Replacement battery for ThinkPad P1 G4

This lithium-ion battery replaces part numbers L20M4P75 and L20D4P75 in Lenovo ThinkPad P1 G4 series laptops. It supplies 90Wh capacity at either 15.52V or 15.48V depending on the variant shipped. The unit is brand new and carries a twelve-month warranty.

Installation and compatibility notes

The battery fits the internal bay of the listed ThinkPad models and connects to the existing motherboard header without adapters. It substitutes for original part numbers SB11B79215, SB11B79216, 5B11B79217, 5B11B79218 and 41CP5/56/142. Buyers whose part number or model number is not shown should verify compatibility before ordering.

Thermal and power behaviour

Lithium-ion chemistry delivers the rated 90Wh with minimal self-discharge during normal mobile use. The pack operates silently and requires no active cooling beyond the laptop’s own thermal design. Power draw follows the system’s charge controller, so no additional supply capacity is needed.

How it compares

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

Price $42.99
Pricier than about 74% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameL20M4P75 L20D4P75
Model nameL20M4P75 L20D4P75
Part number41CP5/56/142
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating15.52 V/15.48 V
Battery capacity90 Wh/90.1 Wh
Compatibility
Compatible withFor ThinkPad P1 G4 Series

Questions about this item

How long does the 90Wh capacity last under continuous heavy load?

Runtime depends on the laptop's power draw; the 90Wh rating indicates total energy storage, not a fixed usage time.

Does the lithium-ion cell generate noticeable heat during all-day operation?

Normal warmth occurs during charging or high load; excessive heat suggests a firmware or hardware issue in the ThinkPad P1 G4.

Must my ThinkPad P1 G4 already have the original L20D4P75 or L20M4P75 part installed?

Yes, this battery replaces part numbers L20D4P75, L20M4P75, SB11B79215, SB11B79216, 5B11B79217, 5B11B79218 and 41CP5/56/142.

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