NiMH replacement Yaesu/Vertex FNBV57 battery provided by AtBatt.com is designed for use with the VX160, VX180, VX210, VX400 two-way models. The 2W-EXFNB57-MH is designed to replace OEM part numbers: FNBV57, FNB57. • Chemistry: NiMH Capacity: 1500mAh 7.5V