Lenovo Go Lithium-Ion (Li-Ion) 20000 mAh Black, GreyThe Lenovo Go USB C Laptop Power Bank (20000 mAh) is a game changing solution for remote workers who need access to a large reserve of power for their USB C laptops and devices to achieve peak productivity. With a whopping 20,000 mAh capacity, you can rapidly charge multiple devices even while you are recharging the power bank. Lenovo Go. Battery capacity: 20000 mAh, Battery technology: Lithium Ion (Li Ion). USB Type A output ports: 1, USB Type C