Replaces OEM # 5B11H56383, 5B11H56384, 5B11H56385, 5B11H56386, L22B3P73, L22C3P76, L22D3P77, L22M3P77, SB11H56285, SB11H56286, SB11H56287 Fits: LENOVO THINKPAD X1 CARBON 12TH GEN, THINKPAD X1 CARBON 12TH GEN 21KC, THINKPAD X1 CARBON 12TH GEN 21KD, THINKPAD X1 2-IN-1 GEN 9, THINKPAD X1 2-IN-1 GEN 9 21KE, THINKPAD X1 2-IN-1 GEN 9 21KF, 21KC0001CD, 21KC002MAU, 21KC002NAU, 21KC002QAU, 21KC002RAU, 21KC002SAU, 21KC002TAU, 21KC0051MZ, 21KC00DAAU, 21KC00DFAU, 21KCCTO1WW, 21KCS02L00, 21KCS10600, 21KCS1N000, 21KCS28Q00, 21KCS2E400, 21KCS4DQ00, 21KDS0SU04, 21KDS0YU00, 21KDS1MM00 Specs: 11.7V, 57WH, 4875MAH, 3 CELL Brand New GreenTech replacement battery - 6 Month Replacement Warranty Each product has undergone rigorous testing to ensure the correct voltage, circuit protection, stable current, low self-discharge and CE / FCC / RoHS Certified for safety