L22D3P78 SB11H56290 5B11H56389. L22D3P78 SB11H56284 5B11H56383. ThinkPad X1 Carbon 12th Gen 21KC 21KD Series. ThinkPad X1 2 in 1 Gen 9 21KE 21KF Series. Battery Type: Li-ion. Battery Capacity: 4800mAh/56.1Wh.
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