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Rectangular black lithium-ion laptop battery with four cells, 51Wh capacity, 15.36V

E-buy

E-buy L18M4P72 51Wh 15.36V 4-Cell Li-ion laptop battery

SKU CH-3YE6-VH6NH

A 51 Wh, 15.36 V, 4-cell lithium-ion replacement battery for ThinkPad X1 Carbon 7th and 8th Gen and X1 Yoga 4th and 5th Gen models

  • Battery TypeLithium-Ion
  • Original-grade replacement for ThinkPad X1 Carbon 7th/8th Gen and X1 Yoga 4th/5th Gen
  • 51Wh lithium-ion capacity delivers 2-3 hours typical runtime per charge
  • 36V 4-cell design matches OEM voltage and cell configuration exactly
  • Built-in protection guards against overcharge, overheating and short circuits
  • Plug-and-play installation requires no drivers or software configuration

Product Identity

The E-buy L18M4P72 is a new 51Wh lithium-ion laptop battery rated at 15.36V with four cells. It serves as a direct replacement for Lenovo ThinkPad X1 Carbon 7th and 8th generation models as well as X1 Yoga 4th and 5th generation units.

Compatibility Scope

This battery fits machines carrying model numbers such as 20QD, 20QE, 20R1, 20R2, 20U9, 20UA, 20UB, 20QF, 20QG, 20SA, 20SB, 20UC and replaces part numbers L18L4P71, L18C4P71, 02DL004, 02DL005, 02DL006 and several SB10 references. Buyers who need a battery for other ThinkPad series or non-Lenovo laptops should look elsewhere.

Sustained Behaviour

The cell chemistry supports up to 500 recharge cycles while built-in circuitry guards against overcharge, overheating and short circuits. Average runtime reaches two to three hours depending on workload and no drivers are required for installation.

Highlights

  • Original-grade replacement for ThinkPad X1 Carbon 7th/8th Gen and X1 Yoga 4th/5th Gen
  • 51Wh lithium-ion capacity delivers 2-3 hours typical runtime per charge
  • 36V 4-cell design matches OEM voltage and cell configuration exactly
  • Built-in protection guards against overcharge, overheating and short circuits
  • Plug-and-play installation requires no drivers or software configuration

Specifications

Battery TypeLithium-Ion

Questions about this item

What laptop models does this L18M4P72 battery fit?

It fits ThinkPad X1 Carbon 7th and 8th Gen plus X1 Yoga 4th and 5th Gen models listed in the compatibility table.

Will the 15.36V rating work with my original 4-cell pack?

Yes, the voltage and cell count match the OEM specification so the laptop will recognise it normally.

How can I confirm the battery is healthy after installing it?

Check that the OS reports 51Wh design capacity and that run time reaches the expected 2-3 hours under typical use.

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