Fic 21-92441-02 is a replacement battery for several FIC models including the LM10W, LM13W, MR056, and VY050. It has a lithium-ion chemistry, 4400mAh capacity, and 11.1V. The battery comes with a 100% quality control check and a one year warranty, with the option to return it within 30 days for a full refund. It is compatible with over 15 different part numbers for various laptop and device models.