Model number: CSB-V131. Weight: 3.7 ounces. Dimensions: 4.5 × 2.5 × 1 inch. Nominal Voltage: 7.4V. Nominal Capacity: 1380mAh. Color: Black. Fits Vertex Standard (UHF & VHF). For use with the UNI Chargers only. Fit YAESU & Vertex-Standard: VX230, VX231, VX228 etc.