Replaces OEM # 5B11F53996, 5B11F54001, L21D4PG3, L21M4PG3, SB11F53999, SB11F54002 Fits: LENOVO 13W YOGA, 13W YOGA 82S1, 13W YOGA 82S2, 13W YOGA GEN 2, 13W YOGA GEN 2 82YR, 13W YOGA GEN 2 82YS Specs: 15.44V, 3305MAH, 51WH, 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