Physical characterizations of some lithium salt solutions in n-butylamine, such as apparent molar volumes, viscosity, vapour pressure measurements, solvation numbers by NMR spectroscopy, electrical conductivities, electroactivity range...have been carried out showing that this amine is a good solvent for lithium batteries. Three salts were used, LiNO3, LiTrif and LiTFSI. Solutions of lithium triflate or LiTFSI are stable toward lithium and possess a good conductivity (better than 3 x 10(-3)S cm(-1) at +20 degrees C) for concentrations far from the saturation (the maximum of conductivity laying within the salt mole fraction interval 0.1-0.2 for LiSO3CF3 . xn-Bu) and an electroactivity range of 4.5 V at a smooth Pt electrode.