【Specifications】Battery type : Li-ion ;Voltage: 11.58V. Capacity: 57Wh/4920mAh . Battery life: Up to 500 recharge cycles over the life of the battery. 【Replace Part Number】L17M3P71 L17M3P72 L17L3P71 01AV478 01AV479 01AV480 SB10K97620 SB10K97621 SB10K97622. 【Compatible Model】Lenovo ThinkPad T480S Series . 【Quality Assurance】New from manufacturer, every battery has passed factory testing, grade A cells ensure fast charges and low power consumption, built-in circuit protection ensures both safety and stability. CE / FCC / RoHS Certified for safety. 【Warranty】30 Days Money Back And 12 Months Exchange Guarantee. if you have any issues, questions or concerns.CONTACT US.We are friendly Customer Support Experts. Please contact through "Your Orders" tab in Amazon account ,we promise to resolve the problem within 24 hours.