Ok, I just had a little fun idea about something that could be implemented into IC2,
We all, one time or another, have made something with minecart rails. I remember back before powered rails, I would use furnace carts to propel my minecarts. Now that powered rails have generally rendered furnace carts completely useless, I had the idea for some form of upgrade to furnace carts (or something very similar to them).
What if you could craft a cart that would move forward if powered by electricity? The cart would be made by combining either a batbox, MFE, or MFSU with a minecart and something else (yes I have seen the energy carts in railcraft, we don't want conflicting recipes) These minecarts would have an inventory and could store power. A person could drain batteries/energy crystals/laptron crystals into the cart, or charge up the cart in some way, and then hit a button to activate it. The cart would then move forward, powered by IC2 electricity. The higher tier of cart, the more energy the cart could store and the faster it would go.
I also thought about this in a different way in which, instead of the minecart being powered, the rails would be powered (kind of like iron fences and a magnatizer) the minecart would then be propelled forward on the rails. The machine that powered the rails would also have three tiers (low voltage, medium voltage, and high voltage). The higher the tier of the machine, the faster the cart would go. I don't think this idea of the tracks being powered is a very good one because if your gonna do that, why not just use powered rails? And if you want your cart to go faster because of the rails, why not use railcraft's high speed rails that don't cost the electricity?
Just another idea from me :), hope you enjoy and give feedback,