I've been trying to pack a portable base with me while I excavate deep down near lava lakes. I figured I could use the lava to recharge my mining laser/energypack so I brought a pump and a pair of geothermal generators. The problem is that you have to also bring an MFE to charge the tier3 items, which is quite expensive. It would be nice if you could drop a pair of transformer upgrades in a generator and have it charge the batpack, or one in a cheaper CESU for the same result.