This high qualityTotalMicro4-Cell 80WHr 15.36V battery meets or exceeds OEM specs and is for the Lenovo ThinkPad P1 Gen 1, P1 Gen 2, X1 Extreme 1st Gen, X1 Extreme 2nd Gen. One year limited warranty. Eqv 01AY969, 5B10W13899, 5B10W13900