I suggest to allow electric locos to carry ic2 batteries (max 50k probably) to allow them to power longer.
Also, add a button in battery cart guis to allow/disallow powering the loco.
I want to see "charging station" designs, which there will be one about every 1000 blocks.

More infos coming.

I like this idea. Could we also consider using power stored in a BatBox/MFE/MFSU cart as though it were a "fuel tank"? Couple the cart directly behind the Electric Locomotive for it to work. Possibly add a switch in the locomotive's GUI to enable/disable this function.

If it is going to power, it will produce a great drag. Once it ends to power, its drag will drop drastically.

I'd prefer to not to tie into IC2 too tightly here. I do plan to add some of my own battery "components" at some point, though.

See #1205

@CovertJaguar Do you plan to add charge battery carts?

Yes, eventually.

Will it be in 10.2? If no, I'd delay this issue.

Its one of those fluid things that will happen when the motivation strikes me probably.