Cumulative charge 3D model is available on CGTrader for $8. Original author: olehrs.
STL (Stereolithography, filesize: 203 KB), OBJ (OBJ, filesize: 162 KB), MAX (Autodesk 3ds Max, filesize: 233 KB), FBX (Autodesk FBX, filesize: 214 KB), TEXTURES (Textures, filesize: 2.58 MB)