(WIP) (advice on recipes needed) Craftable vehicle batteries

Adding items and recipes so that you can build your own vehicle batteries!  This is very much a work in progress, in particular the recipes are mostly guesswork.  
In particular, I could use advice on:

1 - Should the battery case be built from plastic instead of scrap, and need the plastic mold to be built?
2 - How much acid should be in each battery?
3 - How much lead should be needed to craft each plate?
4 - What should the skill difficulty be, and should fabrication be needed as well?
5 - What books should these be learned from, and at what level?
6 - How much time should these take to craft?
7 - Should Comedy Central bring "Brickleberry" back for another season?

If you have any opinions on these or anything else about this mod, please comment!