Specifications: 6 Cell, Li-ion battery, Rated at 11.1V(10.8V Compatible) 4400mAh Compatible Models: for Dell Latitude 14 15 5000 E5440 E5540 Series VV0NF 451-BBIE FT6D9 3K7J7 laptop battery. Compatible Part Numbers0K8HC 0M7T5F 1N9C0 7W6K0 F49WX N5YH9 NVWGM VVONF WGCW6 All ASUNCELL Products are CE- RoHS- FCC- Certified and Built-in circuit protection ensure both safety and stability; Strict guidelines for compatibility, and standards compliance for environmental safety