New goal: Have a power room that is nothing but a TON of BatBoxes. And one MFSU for charging tools and such..... actually..... heck I'll grab the IC2 charge pads mod and hook those up to the batbox quaternary tree (like a binary tree, but with 4 branches each instead of 2). It'd be a room full of batboxes that link into LV transformers, then into MV transformers, and finally HV transformers. Stepping up each time. Could be a neat project. Come to think of it, it kind of makes me think of the concept of an industrial capacitor.
While the inherent hilarity of your proposal does much for it, I'd like to point out that making lithium batteries isn't all that hard once you have a reliable source of aluminium (read: an industrial electrolyzer and a bunch of clay, the latter of which you can get by centrifuging dirt, among other things - although getting dirt renewably requires taking advantage of other mods, and a stack of dirt gets you
two clay. Unless Greg's changed the recipes again, in which case tough luck) - so you could plausibly fill your base with MFEs instead. Really, my proposal was how to power the electrolyzer before you got any aluminium. I guess gold is problematic, though... although with Twilight Forest... hmmm. (Hint: it's not obvious, but NEI mentions that the Pulverizer can mulch weapons and armor into powder.)
Note to self: look into getting redstone crops, the extra bees are hilarious but allegedly the really cool stuff takes ~300 generations. Although with the change in how the Apiary Database works you're not going in completely blind, I guess...
Also, do vanilla ic2 electrolyzers still stick to batboxes? I remember doing that once, although at 10EU/t you're going to have to make three and change to fill up each box. Ridiculous energy capacity though - a full stack of electrolyzed water cells can store about 864000 EU, I think, and with TE magma crucibles, tin is a renewable resource.
Although if you're using TE anyway, you may as well set up a lava tank next to a (geo)thermal generator. (almost) INFINITE STORAGE! More for anybody who works more with the MJ side of things, of course, but still.