Replaces OEM # 5B10X19049, 5B10X19050, L19C4P71, L19M4P71, SB10X19047, SB10X19048 Fits: LENOVO THINKPAD P1 GEN 3 20TH, P1 GEN 3 20TJ, X1 EXTREME 3RD GEN 20TK, X1 EXTREME 3RD GEN 20TL Specs: 15.36V, 5235MAH, 80WHR, 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