New Lenovo Battery Replacement Battery - 11.1V - 3500mAh/39Wh - 3(Li-Poly) Cells Black Colour.Compatible Laptop ModelU41 Series, Flex 3-1570, Flex 3-1580, Flex 3 15 Series, U41-70, U41-70 Flex 3 14 15 Series Flex 3-1470 3-1570 3-1580, Flex 3 14 Ser Product Number: BAT-LEYOGA500