This is the NT8S Transmitter Nimh Battery for the following Futaba radios: 8UA(F/P)S, 8UA(F/P),8UH(F/P)S, 8UH(F/P), 7NFK, 6NPK, 6YF, 6DA, 7C Series Battery pack made with 8 pcs of AA 2000mah NiMH Batteries and Hi-tec connector. Give you the best and highest RC racing performance with this nimh batteries. Rapidly charging is capable at 1C rate.Dimensions: Height 1.14"; Width 1.14"; Length 3.94 " Specially designed for Airtronic @ Hitec RC air transmitter and fit the futaba transmitter