Vertex FNB-V94 (After Market, as Vertex discontinued this product) is the replacement battery for the FNB-V57 and FNB-V83 and is a higher quality 1800 mAh Nickel Metal Hydryde Battery. Vertex FNB-V94 is a compatible with the VX-160 and VX-400 Series Portable two way radios.  The battery typically holds about 12 hours of talk time. 

PL. NOTE THE PIC (ACTUAL VERTEX battery)  IS ONLY FOR REFRENCE.