See 7316d4d
I edited the charge system for a few purposes below:

1. #1036 Interfacing charge system (block)
2. #1413 Fix tile interaction issues with the batteries
3. Serializing nodes to the world so that they don't require a chunk load to be loaded again.
4. Use breath first search to prevent stack overflows (Player suggested using bfs over dfs/recursion)
5. Rename so concepts are clearer (also move some classes out of subclasses)

Now I totally move batteries to blocks. Tiles should always retrieve when needed. Block#onBlockAdded is always called before the te is loaded, so the code is safe.

You talk about serializing nodes, but I don't see code for that anywhere...

Because the names of files were reverted. See https://github.com/Railcraft/Railcraft/blob/7316d4d495f7f11df052121174562cf0fa57d045/src/main/java/mods/railcraft/common/blocks/charge/ChargeSaveData.java

Hmm... you just serialize the ChargeDef, I can see that working pretty well. I hadn't considered that.

I save the def except the battery supplier.