11.1V, 3400mAh, Li-ion Battery fits Lxe, Fc3, Mx9, 37.74WhBattery Fits Models: Fc3, Mx9, Mx9380, Mx9381, Mx9a1b1b1f1a0us, Mx9ab4m0k1fcbda0s0rtusw600, Mx9h Battery Part Numbers: 161888 0001, Sb mx9 l The battery shown will replace your original and provide you with an economical alternative to expensive OEM batteries; we also guarantee the battery to be fresh and free from defects. The replacement battery listed here is developed using the highest quality components. Batteries come in all shapes and sizes;