We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular laptop battery pack with label showing model L20M4P71

PISKEKAT

PISKEKAT L20M4P71 Laptop Battery 57WH 15.44V 4-cell Black

SKU CH-5ABW-ZVT2C

57 Wh lithium-ion replacement battery for Lenovo ThinkPad X1 Carbon 9th and 10th Gen and X1 Yoga 6th and 7th Gen

  • Battery TypeLaptop Batteries
  • Matches original 57WH capacity for equal runtime
  • 44V 4-cell lithium-ion powers X1 Carbon 9th and 10th Gen
  • Certified CE FCC RoHS UL for safe operation
  • Replaces L20C4P71 L20D4P71 L20L4P71 and SB10T series
  • Fits X1 Yoga 6th and 7th Gen Type 20XY 20Y0 21CD 21CE

Compatible ThinkPad Models

This 57 Wh lithium-ion battery replaces the original pack in Lenovo ThinkPad X1 Carbon 9th and 10th Gen laptops as well as X1 Yoga 6th and 7th Gen devices. It matches part numbers L20M4P71, L20C4P71, L20D4P71 and L20L4P71. The black 4-cell unit restores factory runtime for daily office work.

Installation Requirements

The pack fits directly into the internal battery bay without adapters or cable changes. It draws charging current from the laptop’s standard power circuitry so no external charger is needed. Swapping the cell frees the user from tethering to a wall outlet during meetings or travel.

Sustained Load Behaviour

Grade A cells and CE, FCC, RoHS and UL certified construction keep voltage stable across a full discharge cycle. The 15.44 V output maintains consistent clock speeds during long compile sessions or video playback. Buyers needing hot-swap capability or extended capacity beyond 57 Wh should look at alternative solutions.

Highlights

  • Matches original 57WH capacity for equal runtime
  • 44V 4-cell lithium-ion powers X1 Carbon 9th and 10th Gen
  • Certified CE FCC RoHS UL for safe operation
  • Replaces L20C4P71 L20D4P71 L20L4P71 and SB10T series
  • Fits X1 Yoga 6th and 7th Gen Type 20XY 20Y0 21CD 21CE

Specifications

Battery TypeLaptop Batteries

Questions about this item

How long does the 57WH capacity last under sustained load before the 15.44V lithium-ion cells hit their discharge limit?

The 57WH rating represents the total energy the pack can deliver; actual runtime under sustained load depends on the laptop's power draw, which varies by workload and model configuration.

Does the 4-cell 15.44V pack run hotter or draw more power than the original during all-day use?

The replacement uses grade A lithium-ion cells certified to CE, FCC, RoHS and UL standards, matching the original voltage and capacity so thermal and power behaviour stays equivalent.

Which ThinkPad models must I already own for this L20M4P71 battery to fit and work?

It fits Lenovo ThinkPad X1 Carbon 9th Gen (types 20XW, 20XX), X1 Carbon 10th Gen (types 21CB, 21CC), X1 Yoga 6th Gen (types 20XY, 20Y0) and X1 Yoga 7th Gen (types 21CD, 21CE).

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.