Features which would be cool:

• Something that makes the machines faster (like capacitors in EnderIO)
• Add gear which can be filled with FE for faster mining speed, more armor points and more damage
• Make it so the "Power Bank" can charge stuff or make a seperate block which is a charger (would also make sense to add a wireless one then)

I like all of your ideas , i will add them all soon , the energy cell and all generators including solar panels all have 2 charging slots, Thank you!