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Rectangular black laptop battery with four cells and label showing 15.36V

Battery Technology Inc.

Battery Technology Inc. 5B10X19049-BTI 4-cell 15.36V laptop battery

SKU CH-DFN8-A1Q7N

Four-cell 15.36 V lithium-ion replacement battery for ThinkPad P1 Gen 3 and X1 Extreme 3rd Gen models

  • TypeLaptop Batteries
  • Replaces original ThinkPad 5B10X19049 and 5B10X19050 packs
  • Matches OEM part numbers L19C4P71 and L19M4P71
  • Fits ThinkPad P1 Gen 3 models 20TH and 20TJ
  • Powers X1 Extreme 3rd Gen units 20TK and 20TL
  • 4-cell 15.36V lithium-ion design delivers reliable runtime

BTI 4-cell 15.36V Li-Ion replacement battery

This 4-cell lithium-ion battery delivers 15.36 volts for select Lenovo ThinkPad mobile workstations. It replaces OEM part numbers 5B10X19049, 5B10X19050, L19C4P71, L19M4P71, SB10X19047 and SB10X19048. The pack is built for ThinkPad P1 Gen 3 models 20TH and 20TJ as well as X1 Extreme 3rd Gen models 20TK and 20TL.

Verify your exact ThinkPad model and OEM part number

Before ordering, confirm that your device matches one of the four listed model numbers: 20TH, 20TJ, 20TK or 20TL. Cross-reference the battery currently installed against the six OEM part numbers above to ensure physical and electrical compatibility. This battery is not suitable for other ThinkPad series, earlier or later generations, or any non-Lenovo notebook.

No bundled accessories or software included

The package contains only the battery itself; no installation tools, screws, adapters or diagnostic utilities are supplied. Fitment relies on the existing hardware in your notebook, so no additional components are required. There is no firmware or management software to install — the battery communicates with the system through the standard interface already present in the supported models.

Highlights

  • Replaces original ThinkPad 5B10X19049 and 5B10X19050 packs
  • Matches OEM part numbers L19C4P71 and L19M4P71
  • Fits ThinkPad P1 Gen 3 models 20TH and 20TJ
  • Powers X1 Extreme 3rd Gen units 20TK and 20TL
  • 4-cell 15.36V lithium-ion design delivers reliable runtime

Specifications

BrandBattery Technology Inc.
TypeLaptop Batteries

Questions about this item

Does the battery include installation hardware or must I buy tools separately?

The replacement battery ships as a single unit matching OEM part numbers 5B10X19049, 5B10X19050, L19C4P71, L19M4P71, SB10X19047 and SB10X19048; no extra hardware or tools are included.

Which ThinkPad models does the 15.36 V 4-cell pack fit?

It is compatible with ThinkPad P1 Gen 3 20TH, P1 Gen 3 20TJ, X1 Extreme 3rd Gen 20TK and X1 Extreme 3rd Gen 20TL.

What runtime can I expect from the 15.36 V 4-cell battery in a ThinkPad P1 Gen 3?

The 4-cell lithium-ion pack delivers the same voltage and cell count as the original 5B10X19049, providing equivalent runtime for the supported P1 and X1 Extreme models.

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