Here is the link to the exact dye I used:
http://www.ritdye.com/Powders.28.51.6.lasso
My Wal-mart only had a set of boxed and bottled dye. Any of the boxed dye for fabrics will work as RIt is likely the only brand Wal-mart carries. (Bottled too except its already in a liquid formula)
This is exactly what I did:
1. Remove cover from phone. Wash to remove any finger prints, oil, etc.
2. Heat small pot of water. Must be hot enough just enough to scald you.
3. Dump dye contents into pot and stir.
4. Submerge battery cover completely and still gently for 15 minutes. Use a soft utensil as to not scrap or scratch your cover.
5. After desired dying is achieved, remove and place under sink spicket and rinse until no more dye is seen. Dry and its ready to use!
It really is that easy.
(Of course I dont take any responsibility. I only offer the experience and results shown thereafter in the pics. Please repeat at your own risk)