Lenovo Battery (5B11H56349) - 57Wh Li-Polymer, 4-Cell, for ThinkPad X1 Carbon Gen 9/10, X1 Yoga Gen 6/7

If your Lenovo ThinkPad X1 Carbon Gen 9 or Gen 10, or ThinkPad X1 Yoga Gen 6 or Gen 7, no longer holds a charge through a full workday, this replacement battery restores reliable mobile power. It is a 4-cell lithium-polymer pack with a 57 Wh capacity and 15.36 V output, matching the original specifications for these ultrabooks.

Key specifications

• Battery type: Lithium-Ion Polymer (Li-Po)
• Voltage: 15.36 V
• Capacity: 57 Wh (3715 mAh)
• Number of cells: 4
• Compatible models: ThinkPad X1 Carbon Gen 9, ThinkPad X1 Carbon Gen 10, ThinkPad X1 Yoga Gen 6, ThinkPad X1 Yoga Gen 7
• Alternative part numbers: L20M4PC1, L20C4PC1, L20D4PC1, L20L4PC1

Why choose it

This battery is built to the same voltage and capacity as the original, ensuring consistent performance and safe charging with your Lenovo system. The 57 Wh rating provides enough power for typical office tasks, web browsing, and video conferencing, helping you stay productive away from an outlet.

Ideal use cases

• Replacing a worn-out battery in a Lenovo ThinkPad X1 Carbon Gen 9 or Gen 10
• Restoring battery life in a ThinkPad X1 Yoga Gen 6 or Gen 7
• Keeping a spare battery for extended travel or field work

Good to know

Installation requires opening the laptop chassis; if you are not comfortable with internal hardware, professional installation is recommended. The battery is rechargeable and designed for internal use only.