Replaces OEM # L20C4P73, L20D4P73, L20L4P73, L20M4P73, SB10W51919, SB10W51921, SB10W51953, SB10W51955, SB10W51956, SB11M89871, SB11M89872, 5B10W51818, 5B10W51820, 5B10W51852, 5B10W51854, 5B10W51855, 5B11M90068, 5B11M90070, 5B11M90071 Fits: LENOVO THINKPAD X13 GEN 3, THINKPAD X13 GEN 3 21CM, THINKPAD X13 GEN 3 21CN, THINKPAD X13 GEN 3 21BN, THINKPAD X13 GEN 3 21BQ, THINKPAD X13 GEN 2, THINKPAD X13 GEN 2 20WK, THINKPAD X13 GEN 2 20WL, THINKPAD X13 GEN 2 20XH, THINKPAD X13 GEN 2 20XJ Specs: 15.36V, 3564MAH, 54.7WH, 4 CELL Brand New GreenTech replacement battery - 6 Month Replacement Warranty Each products has undergone rigorous testing to ensure the correct voltage, circuit protection, stable current, low self-discharge and CE / FCC / RoHS Certified for safety