A simple battery pack made following the tutorial made by Johnathan Williamson. Since that tutorial is old I used Cycles instead of LuxRender. Texture of battery wasn't created by me and the one who made it takes full credit for it. link for texture:
http://www.spatsart.com/2011/05/rendering-and-uv-texture-for-some.html
Make sure to unpack first and then render. I hope you like it :)
Niiice. Looks cool.