Replaces OEM # L18M4P72, L18C4P71, SB10K97644, 02DL006, L18L4P71, SB10K97642, 02DL004, SB10K97643, 02DL005, L18C4P72, L18L4P72 Fits: LENOVO THINKPAD X1 YOGA 4TH 5TH GEN, THINKPAD X1 CARBON 7TH 8TH GEN Specs: 15.36V, 3325MAH, 51WHR, 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