Replaces OEM # L21C4P72, L21D4P72, L21M4P74, SB10W51972, SB10W51973, SB11M89837, SB11M89839, 5B10W51871, 5B10W51872, 5B10W51873, 5B11M90036, 5B11M90037, 5B11M90038, 5B11M90039 Fits: LENOVO THINKPAD P16S GEN 1, THINKPAD P16S GEN 1 21BT, THINKPAD P16S GEN 1 21BU, THINKPAD P16S GEN 1 21CK, THINKPAD P16S GEN 1 21CL, THINKPAD P16S GEN 2, THINKPAD P16S GEN 2 21HK, THINKPAD P16S GEN 2 21HL, THINKPAD P16S GEN 2 21K9, THINKPAD P16S GEN 2 21KA, THINKPAD T16 GEN 1, THINKPAD T16 GEN 1 21CH, THINKPAD T16 GEN 1 21CJ, THINKPAD T16 GEN 2, THINKPAD T16 GEN 2 21HH, THINKPAD T16 GEN 2 21HJ, THINKPAD T16 GEN 2 21K7, THINKPAD T16 GEN 2 21K8 Specs: 15.44V, 5570MAH, 86WH, 4 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