Replaces OEM # L21B4P71, L21L4P73, L21M4P75, SB10W51975, SB10W51976, SB10W51978, 5B10W51874, 5B10W51875, 5B10W51876, 5B10W51877 Fits: LENOVO THINKPAD T14S GEN 3, T14S GEN 3 21BR, T14S GEN 3 21BS, T14S GEN 3 21CQ, T14S GEN 3 21CR, T14S GEN 4, T14S GEN 4 21F6, T14S GEN 4 21F7 Specs: 15.36V, 57WHR, 3711MAH, 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