This BTI battery is compatible with the Lenovo ThinkPad P1 Gen 1 / Gen 2, X1 Extreme Gen 1 / Gen 2. OEM P/N: 01AY969, 5B10W13953, SB10S57317, 01YU911, L17C4P72, SB10T83143, 5B10W13899, L18M4P71, SB10T83196, 5B10W13900, SB10Q76929. We recommend: Advance exchange for this product is available directly through Origin Storage throughout the 18-month warranty period. Please note: Please get in touch with us if you have any questions.