Genuine Lenovo 5B10W13974 Battery for ThinkPad X1 Carbon (9th Gen) — 57Wh 4-Cell

Brand-new, genuine Lenovo replacement battery (part number 5B10W13974) engineered for the ThinkPad X1 Carbon 9th Gen. This OEM unit delivers a 57Wh capacity in a 4-cell configuration and is intended as a direct replacement that matches the original specifications and fit.