I've had a burning thought for a while. Since the introduction of all this new charging and discharging of batteries and crystals, why not let machines make use of them?
Here's what I'm thinking...
-Crystal chargers can discharge their products into any sort of machines that's connected to them now. While the machines are active, energy drains.
-Crystals will not lose power while machines are idle, much like the MFE/MFSU machines.