lion4dSoftware Overview WHAT IS GT-AUTOLION?. GT-AutoLion is the industry-leading lithium-ion battery simulation software used by cell desners and OEMs to predict performance,Free Lion 3D models in OBJ, Blend, STL, X, Three.JS formats for use in Unity 3D, Blender, Sketchup, Cinema 4D, Unreal, 3DS Max and Maya.