The KingSener 00HW003 SB10F46440 45N1700 Laptop Battery is a high-quality replacement battery for Lenovo ThinkPad X1 Carbon Gen3 2015 and X1 Carbon 2014 Gen2 laptops. It has a capacity of 3.29Ah/50WH and a voltage of 15.2V. The battery is made of Li-polymer and has 4 cells. It is black in color and comes in a brand new condition. The battery is certified with CE and FCC and comes with a 2-year warranty.