As I've read somewhere that electric minecarts will be implemented sooner or later.
I've got an interesting addon for that.
Is it possible to code minecrats in a way that they can connect to each other by combining an electric minecart with a slimeball or sticky raisin to make it "stick" to another cart.
by doing this you could have an elelctric minecart in front, you sitting behind it and refueling with batteries, and up to 6 chestcarts behind yourself filled with mined goodies.