DQ-KY477-6 Features: -Safe lithium-ion technology.-Smart technology communicates accurate information to the camera.-Rechargeable Battery.-No memory-effect.-Overcharge protection built in.-6 Cells.-Provides 5200mAh of capacity.-Replaces the following DELL part numbers: 312-0748, 312-0754, 312-0917, 451-10583, C719R, FU268, FU272, FU274, FU439, KY266, KY268, KY466, KY477, MP303, MP307, MP490, NM631, NM632, NM633, PP27L, PP30L, PT434, PT435, PT436, PT437, PT644, U844G.-Fits the following DELL models: DELL PRECISION M4400, DELL LATITUDE E6400, DELL LATITUDE E6400 ATG, DELL LATITUDE E6400 XFR, DELL LATITUDE E6500, DELL PRECISION M2400, DELL PRECISION M6400.