[Replacement Battery Type] L20C4P71 battery with a lithium-ion battery type, 15.44V voltage, 57WH capacity, 4-cell configuration, and black color. This battery delivers the same operating time as the original. [Compatible Part Numbers] L20M4P71, L20C4P71, L20D4P71, L20L4P71, SB10T83217, SB10T83218, SB10T83215, SB10T83216, 5B10W13974, 5B10W13975, 5B10W13972, and 5B10W13973. [Compatible Models] For Lenovo ThinkPad X1 Carbon 9th Gen Laptop; Lenovo ThinkPad X1 Carbon 9th Gen Type 20XW 20XX Series; Lenovo ThinkPad X1 Carbon 10th Gen Laptop; Lenovo ThinkPad X1 Carbon 10th Gen Type 21CB 21CC Series; Lenovo ThinkPad X1 Yoga 6th Gen Laptop; Lenovo ThinkPad X1 Yoga 6th Gen Type 20XY 20Y0 Series; Lenovo ThinkPad X1 Yoga 7th Gen Laptop; and Lenovo ThinkPad X1 Yoga 7th Gen Type 21CD 21CE Series.
This battery is certified by CE, FCC, RoHS, and UL for safety and standards compliance for environmental safety. It uses grade A cells and ion battery materials to support reliable performance and extended operating time