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Rectangular black lithium-ion laptop battery pack

BFKK

BFKK 02DL005 15.36V 51Wh laptop battery

SKU CH-XKEX-470VW MPN 02DL005

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

  • Plug-and-play Li-ion design for easy installation
  • 36V 51Wh capacity delivers reliable runtime
  • Replaces multiple Lenovo part numbers including 02DL005 and 02DL006
  • Fits ThinkPad X1 Yoga 4th Gen and X1 Carbon 7th and 8th Gen
  • New condition ensures full performance from first use

Replacement Battery for ThinkPad X1

The BFKK 02DL005 is a new 15.36V 51Wh lithium-ion battery built as a direct replacement for Lenovo ThinkPad X1 Yoga 4th Gen, X1 Carbon 7th Gen 2019 and X1 Carbon 8th Gen 2020 models. It replaces part numbers 02DL005, 02DL006, 02DL004 and associated SB10K codes. The plug-and-play design allows straightforward installation after verifying the original battery model number.

Who This Suits and Who It Does Not

This unit suits owners of the listed ThinkPad models who need a 51Wh 3321mAh replacement and can confirm the original battery part number before purchase. It is not for users of other ThinkPad generations or laptop brands, nor for buyers who cannot open the back case to check the existing battery model number. Compatibility depends on matching the exact part number printed on the original battery.

Deciding Specification: Voltage and Capacity

The single specification that decides fit is the 15.36V 51Wh rating combined with the correct part number match. Only batteries showing 15.36V and 51Wh that also correspond to part numbers 02DL005, 02DL006 or 02DL004 will work in the target X1 Yoga and X1 Carbon models. Always verify the original battery label before ordering.

How it compares

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

Price $68.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

Does the 15.36 V 51 Wh pack fit inside the X1 Carbon 7th Gen bottom case without extra brackets?

It is built to the original 02DL005 form factor, so it seats directly in the battery bay of the X1 Carbon 7th Gen, 8th Gen and X1 Yoga 4th Gen with no additional hardware.

What is the correct order to connect the plug-and-play Li-ion battery after opening the back cover?

Disconnect the old pack first, align the connector keying on the 02DL005 replacement, press firmly until it clicks, then reassemble the case before powering on.

When should I replace the 3321 mAh cell pack based on the original 51 Wh rating?

Replace it once a full charge delivers noticeably less run-time than when new, indicating the cells have aged past useful capacity.

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