OUWEE Laptop Battery for Lenovo ThinkPad X1 Yoga / X1 Carbon

OUWEE L18L4P71 is a 15.4V, 51Wh Li-ion replacement battery engineered to restore mobile power to Lenovo ThinkPad X1 Yoga (4th/5th Gen) and X1 Carbon (7th/8th Gen) laptops.

If your ThinkPad's run time has shortened or the original battery no longer holds charge, this OUWEE replacement offers a direct-fit, new-condition Li-ion pack with the correct voltage, capacity and matching connector layout. The battery ships with two screwdrivers and an installation guide to simplify swapping units, plus safety certifications and a manufacturer's warranty for peace of mind.

Which Lenovo models and part numbers will this battery work with?

This OUWEE battery is built to match the mounting, power and communication requirements of specific X1 Yoga and X1 Carbon generations. It replaces original part numbers and fits the internal bay used by those notebooks.

• Compatible models: ThinkPad X1 Yoga 4th Gen (2019) and 5th Gen (2020), ThinkPad X1 Carbon 7th Gen (2019) and 8th Gen (2020).
• Replaces part numbers: 02DL004, 02DL005, 02DL006, SB10K97642, SB10K97643, SB10K97644.
• Connector, shape and screw positions match OEM specifications for these series.

How long will the battery run and what are the key specs?

The OUWEE L18L4P71 supplies 15.4 volts and 51Wh (3312mAh) using four Li-ion cells, designed to deliver similar run times to the original pack under comparable workloads. Typical battery life depends on workload, screen brightness and background apps, but users can expect several hours of use from a full charge under mixed tasks.

• Voltage: 15.4V; Capacity: 51Wh (3312mAh); Cells: 4.
• Estimated run time range under normal use: roughly 3–6 hours depending on settings.
• Condition: New replacement with tested capacity and stable current output.

What safety and warranty protections come with this pack?

OUWEE emphasizes compliant manufacturing and post-sale support to reduce risk and give buyers confidence. The battery is certified to common safety and environmental standards and includes a warranty plus a satisfaction window.

• Certifications: UL, CE, FCC and RoHS compliant for safety and environmental standards.
• Warranty: 12-month limited warranty and 30-day money-back option.
• Support: 24/7 email support; installation instructions and two screwdrivers included in the package.

Will installation be difficult and what comes in the box?

Installation is straightforward for users comfortable opening a notebook’s bottom cover; OUWEE supplies basic tools and a short guide to help. If you prefer professional service, a laptop repair shop can swap the pack quickly using the provided screwdrivers.

• Included: 1x L18L4P71 battery, 2x screwdrivers, 1x instruction sheet.
• Tip: Power down, remove external power, ground yourself, and follow the guide to avoid damage while installing.
• Optional: Seek a technician if you are unsure about internal hardware replacement.

Who is this for: The OUWEE L18L4P71 battery is intended for ThinkPad owners who need a full-capacity replacement for X1 Yoga (4th/5th Gen) or X1 Carbon (7th/8th Gen) notebooks. It suits home users, mobile professionals and repair technicians who want an OEM-compatible pack with safety certifications, an included toolset and a backed warranty — a practical choice when your existing battery shows wear, fails to charge, or needs replacement to restore reliable mobile performance.